FaultScore

FaultScore report

2020 Freightliner Cascadia problems

Owners have filed 47 complaints about the 2020 Freightliner Cascadia with NHTSA between 2019 and 2026. The largest single group is the driver assist & collision avoidance. Across this model's run it ranks 2 of 15 worst.

F

FaultScore 90/100

Higher is worse. Measured against the other years of the Freightliner Cascadia.

How this is worked out

The numbers

47

Complaints

6

Crashes reported

0

Fires reported

3

Injuries reported

51,600 mi

Median mileage at failure

Half of reported failures happened before this

40%

Failed under 36,000 miles

Inside a typical bumper-to-bumper warranty

What kind of bad

The letter says how bad. This says what kind — whether this year drew an unusual number of complaints, unusually dangerous ones, or failures that arrived unusually early.

Complaint volume 94 vs 50 Severity 99 vs 50 Early failure 68 vs 50
The dashed ring is 50 — the national norm. Further out is worse.
Complaint volume — 94
Against the median year of the Freightliner Cascadia. 50 means typical for this model; 100 means roughly double.
Severity — 99
19.1% of these complaints involved a crash, fire, injury or death, against a national rate of 9.7%.
Early failure — 68
40% of failures with a mileage on record happened under 36,000 miles, against a national rate of 29%.

How 2020 compares with every other Freightliner Cascadia

Click any bar to open that year's report.

Complaints filed with NHTSA, by model year. Bar colour is the FaultScore grade: A B C D F ungraded

What breaks on a 2020 Freightliner Cascadia

Every complaint is filed against a part. Follow any row for the complaints about that part alone.

3 crashes, 0 fires · median 51,600 mi

Brakes 8 17.0%

2 crashes, 0 fires

Tires 5 10.6%

Median failure at 245,000 miles

Electrical System 5 10.6%

Median failure at 4,766 miles

Other & Unspecified 4 8.5%

1 crashes, 0 fires · median 51,600 mi

Engine & Cooling 3 6.4%
Acceleration & Cruise Control 2 4.3%

Median failure at 4,766 miles

Steering 2 4.3%
Fuel & Propulsion 1 2.1%
Body & Structure 1 2.1%

Median failure at 348 miles

Exactly what failed

NHTSA files every complaint against a named sub-assembly, not just a system. This is the difference between knowing it was "the engine" and knowing which part of it — the list to hand a mechanic.

Automatic Emergency Braking 9 40.9%
Warnings 6 27.3%
Emission Control 2 9.1%
Auto Crash Notification 1 4.5%
Pressure Monitoring AND Regulating Systems 1 4.5%
Instrument Cluster/Panel 1 4.5%
Antilock 1 4.5%
Bead 1 4.5%

When it fails

Odometer readings owners gave when they filed. About half of all complaints include one.

Under 1,000 miles 2 20.0%
1,000 – 9,999 miles 2 20.0%
50,000 – 74,999 miles 3 30.0%
150,000+ miles 3 30.0%

When owners complained

A spike years after the car went on sale usually means a part wearing out on schedule across the whole fleet — the kind of pattern no single owner can see from inside their own car.

Apr 2019 peak 4 Feb 2026

NHTSA investigations into the 2020 Freightliner Cascadia

An investigation is the step before a recall: the agency has seen enough complaints to look into a pattern itself. An open one means it thinks something may be wrong and nothing has been fixed yet.

1 investigation is still open.

EA25006 Opened 23 Oct 2025 Still open FORWARD COLLISION AVOIDANCE: DYNAMIC BRAKE SUPPORT/BRAKE ASSIST

Automatic Emergency Braking Errors

On May 26, 2023, the Office of Defects Investigation (ODI) opened a Preliminary Evaluation (PE23010) to assess reports of false positive activation of the Automatic Emergency Braking (AEB) system in model year (MY) 2017-2022 Daimler Trucks North America (DTNA) vehicles. The reports alleged that activation of the AEB system occurred while driving with no apparent obstruction in the vehicle's forward path, resulting in sudden vehicle deceleration. DTNA indicated that it received of a total of 315 reports that may relate to the alleged defect in MY 2017-2022 DTNA vehicles. DTNA stated that the va...

PE23010 Opened 26 May 2023 Closed 23 Oct 2025 FORWARD COLLISION AVOIDANCE: DYNAMIC BRAKE SUPPORT/BRAKE ASSIST

Automatic Emergency Braking Errors

On May 26, 2023, the Office of Defects Investigation (ODI) opened a Preliminary Evaluation (PE23010) to assess reports of false positive activation of the Automatic Emergency Braking (AEB) system in model year (MY) 2017-2022 Daimler Trucks North America (DTNA) vehicles. The reports alleged that activation of the AEB system occurred while driving with no apparent obstruction in the vehicle's forward path, resulting in unexpected and sudden vehicle deceleration. ODI sent an information request letter to DTNA on June 15, 2023.In its September 1, 2023, response, DTNA indicated that it received of...

PE21004 Opened 25 Feb 2021 Closed 14 Jan 2025 ELECTRICAL SYSTEM

Engine Electrical Wiring Harness Chafe

The Office of Defects Investigation (ODI) opened this Preliminary Evaluation to investigate reports of engine electrical wiring harness chafe on the subject vehicles.ODI analysis found thousands of unique harness part numbers, spanning the two generations of vehicle chassis assembled at multiple vehicle assembly plants in two different countries, with multiple sub-models, incorporating over thirty powertrain choices.Each wiring harness could contain several dozen individual wires for power, ground and communication purposes depending on the multitude of equipment options available for custom v...

PE21006 Opened 25 Feb 2021 Closed 16 Jul 2021 EXTERIOR LIGHTING:HEADLIGHTS

Halogen Headlights May Cause Fires

In its process for evaluating Early Warning Reporting data, the Office of Defects Investigation (ODI) found twenty-four (24) field reports involving headlight fires on Freightliner Cascadia trucks, model years 2017 and newer produced by the vehicle manufacturer, Daimler Trucks North America (DTNA). ODI contacted DTNA and learned that it was aware of halogen bulb-related thermal events. DTNA stated a belief that the issue was due to incorrect bulb replacement during maintenance. However, some vehicles experienced fires within the original equipment halogen bulb's expected life range.In July 201...

RQ20001 Opened 31 Aug 2020 Closed 26 Jun 2025 ELECTRICAL SYSTEM

SAM Cab Water Intrusion

On August 31, 2020, the Office of Defects Investigation (ODI) opened a recall query, RQ20001, to investigate the allegations of water intrusion into the truck cab signal-detect and activation module (SAM cab).The investigation further evaluated the effectiveness of the original recall remedy, and the installation of an updated drip shield as it relates to continual water intrusion resulting in the loss of electrical functions and potential fire.The potential hazard was the increased risk of a crash and injury in certain model year (MY) 2007-2021 Freightliner Cascadia P3 vehicles manufactured b...

Recalls on the 2020 Freightliner Cascadia

A complaint is one owner's allegation. A recall is the point at which the manufacturer or a regulator agreed the defect is real and dangerous enough to fix for free — however old the car is.

Canada — Transport Canada

Canada runs its own recall programme, and its campaigns do not always mirror the American ones.

Recall 2023280 903 units in Canada

Lights And Instruments

Issue: Under certain conditions, the hazard lamps could flash improperly when the active brake assist (ABA) system applies full emergency braking. Note: This recall only affects trucks equipped with the Detroit Assurance 5.0 safety system package. Safety Risk: Hazard lamps that flash improperly could create confusion for others and increase the risk of a crash. Corrective Actions: Daimler Truck North America (DTNA) will notify owners by mail and advise you to take your truck to a DTNA authorized service facility to update vehicle software.

Recall 2023083 3,460 units in Canada

Steering

Issue: On certain trucks, the joint connecting the steering arm to the drag link may not have been properly tightened. As a result, the joint could loosen and separate, causing a loss of steering control. Safety Risk: A loss of steering control could create the risk of a crash. Corrective Actions: Daimler Truck North America (DTNA) will notify owners by mail and instruct you to take your truck to a DTNA authorized service facility to inspect the castle nut on the drag link taper joint. The nut will be checked for the correct torque, and tightened or repaired, as necessary.

Recall 2023051 20,527 units in Canada

Brakes

Issue: On certain trucks, the brake modulator valves could corrode. As a result, the brakes on one wheel could fully apply when the roll stability control system activates. If this happens, there could be a brake pull that can cause the truck to change direction. Note: This problem does not affect the service brakes. Safety Risk: A brake pull that causes the vehicle to change direction suddenly can increase the risk of crash. Corrective Actions: Daimler Truck North America (DTNA) will notify owners by mail and instruct you to take your truck to a DTNA authorized service facility to inspect, and if necessary, replace the brake modulator valves.

Recall 2022626 7,140 units in Canada

Brakes

Issue: On certain trucks, the brake modulator valves could corrode. As a result, the brakes on one wheel could fully apply during an adaptive cruise control braking event. If this happens, there could be a brake pull that can cause the truck to change direction. Note: This problem does not affect the regular service brakes. Safety Risk: A brake pull that causes the vehicle to change direction suddenly can increase the risk of crash. Corrective Actions: Daimler Truck North America (DTNA) will notify owners by mail and instruct you to take your truck to a DTNA authorized service facility to inspect, and if necessary, replace the brake modulator valves.

Recall 2021756 389 units in Canada

Fuel System

Issue: On certain trucks, the fuel tubes between the fuel rail and the injectors may crack and create a fuel leak. Note: This recall only affects trucks equipped with a Cummins X12 diesel engines. Safety Risk: A fuel leak can create the risk of a fire. Corrective Actions: Cummins will notify owners by mail and instruct you to take your truck to a Cummins authorized service center to replace the fuel tubes for cylinders 4, 5 and 6 and install vibration isolators.

Recall 2021545 7,538 units in Canada

Steering

Issue: On certain trucks, the joint connecting the steering arm to the drag link may not have been properly tightened. As a result, the joint could loosen and separate, causing a loss of steering control. Safety Risk: A loss of steering control could create the risk of a crash. Corrective Actions: Daimler Trucks North America (DTNA) will notify owners by mail and instruct you to take your truck to a DTNA authorized service facility to inspect the castle nut on the drag link taper joint. The nut will be checked for the correct torque, and tightened or repaired, as necessary.

Recall 2021399 12,269 units in Canada

Electrical

Issue: On certain trucks built with aluminum battery cables, the terminal that attaches the battery cable to the frame may break. If this happens, there could be a loss of electrical power and the engine could shut off suddenly. Safety Risk: A loss of power while driving could increase the risk of a crash. Corrective Actions: Daimler Trucks North America (DTNA) will notify owners by mail and instruct you to take your truck to a DTNA authorized service facility to inspect the battery cables for corrosion and/or damage. They will be repaired or replaced with copper cables, as necessary.

Recall 2021290 977 units in Canada

Lights And Instruments

Issue: On certain trucks, if the headlamp bulb is replaced and not properly installed, it could move and contact other parts inside the headlamp. Safety Risk: A headlight bulb that touches other parts could cause the headlamp to melt or catch fire. Corrective Actions: Daimler Trucks North America (DTNA) will notify owners by mail and instruct you to take your truck to a DTNA authorized service facility to modify the headlamp assembly and inner fender to assist with headlamp bulb replacement. A warning label/sticker will also be installed.

Recalls cover specific build ranges, so check your own vehicle by VIN at nhtsa.gov/recalls or, in Canada, Transport Canada.

Complaints that involved harm

Reports where the owner recorded a crash, a fire, an injury or a death.

Fontana, CA Crash

SERVICE BRAKES

A collision avoidance system (CAS), also known as a pre-crash system, forward collision warning system (FCW), or collision mitigation system, is an advanced driver-assistance system designed to prevent or reduce the severity of a collision. System applied brakes bringing our Unit to a complete stop traveling 55 MPH on an Interstate while making a lane change, Because of this our Unit was rear-ended by another CMV, On board cameras video on both V1 and V2 clearly show incident. A print out of the DDEC shows code for braking system control at exact time of incident. In our fleet we have the same 2020 Freightliner Cascadia with this system and in trying to maintain the safety of our drivers and equipment no to mention our Insurance cost and CSA scores, This is a major issue as you can see on the Web the many cases and stories of these same incidents happening. Direction is needed Thank You

NHTSA complaint #11570495 — an unverified report by a vehicle owner.

Fontana, CA Crash

FORWARD COLLISION AVOIDANCE: WARNINGS

A collision avoidance system (CAS), also known as a pre-crash system, forward collision warning system (FCW), or collision mitigation system, is an advanced driver-assistance system designed to prevent or reduce the severity of a collision. System applied brakes bringing our Unit to a complete stop traveling 55 MPH on an Interstate while making a lane change, Because of this our Unit was rear-ended by another CMV, On board cameras video on both V1 and V2 clearly show incident. A print out of the DDEC shows code for braking system control at exact time of incident. In our fleet we have the same 2020 Freightliner Cascadia with this system and in trying to maintain the safety of our drivers and equipment no to mention our Insurance cost and CSA scores, This is a major issue as you can see on the Web the many cases and stories of these same incidents happening. Direction is needed Thank You

NHTSA complaint #11570495 — an unverified report by a vehicle owner.

Fontana, CA Crash

FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING

A collision avoidance system (CAS), also known as a pre-crash system, forward collision warning system (FCW), or collision mitigation system, is an advanced driver-assistance system designed to prevent or reduce the severity of a collision. System applied brakes bringing our Unit to a complete stop traveling 55 MPH on an Interstate while making a lane change, Because of this our Unit was rear-ended by another CMV, On board cameras video on both V1 and V2 clearly show incident. A print out of the DDEC shows code for braking system control at exact time of incident. In our fleet we have the same 2020 Freightliner Cascadia with this system and in trying to maintain the safety of our drivers and equipment no to mention our Insurance cost and CSA scores, This is a major issue as you can see on the Web the many cases and stories of these same incidents happening. Direction is needed Thank You

NHTSA complaint #11570495 — an unverified report by a vehicle owner.

Milwaukee, WI Crash 1 injured

UNKNOWN OR OTHER

Semi was traveling on the highway and transporting a 48,000 pound steel coil. The steel coil was secured with 4 chains. The automatic emergency braking system engaged with nothing in front of the vehicle, causing it to suddenly come to a dead stop in traffic. This caused the steel coil to break free of its bounds, crash through the trailer and into the vehicle cab, trapping the driver.

NHTSA complaint #11547088 — an unverified report by a vehicle owner.

Milwaukee, WI Crash 1 injured

SERVICE BRAKES

Semi was traveling on the highway and transporting a 48,000 pound steel coil. The steel coil was secured with 4 chains. The automatic emergency braking system engaged with nothing in front of the vehicle, causing it to suddenly come to a dead stop in traffic. This caused the steel coil to break free of its bounds, crash through the trailer and into the vehicle cab, trapping the driver.

NHTSA complaint #11547088 — an unverified report by a vehicle owner.

Milwaukee, WI Crash 1 injured

FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING

Semi was traveling on the highway and transporting a 48,000 pound steel coil. The steel coil was secured with 4 chains. The automatic emergency braking system engaged with nothing in front of the vehicle, causing it to suddenly come to a dead stop in traffic. This caused the steel coil to break free of its bounds, crash through the trailer and into the vehicle cab, trapping the driver.

NHTSA complaint #11547088 — an unverified report by a vehicle owner.

The most recent complaints

In the owners' own words, exactly as filed with NHTSA.

Lanham, MD

UNKNOWN OR OTHER

The vehicle whose VIN and other identifying details are stated above was sold on May 27 by [XXX] , owner of Koza Transportation LLC, to my company, Skyturk Transportation LLC, which I established in the United States. At the time of sale, the vehicle’s mileage was represented as 395,204 miles and supported by video and photographic evidence. However, subsequent investigations revealed that the same vehicle had been listed and sold on April 29 through BidCars with a recorded mileage of 843,194 miles. This clearly shows the odometer was rolled back by the seller or individuals acting with his knowledge. The vehicle, with reduced mileage, was sold to me at a grossly inflated price. It was also later discovered to be a severely damaged/salvage vehicle, a material fact not disclosed at the time of sale. After I brought this to the seller, he initially stated he would repurchase the vehicle but later claimed he could not contact the person he bought it from and gave inconsistent statements. Information obtained thereafter confirmed these actions constitute a federal offense. Official reports have been filed with the District Attorney’s Office and the DMV through my attorney, and legal and criminal proceedings are ongoing. Due to the investigation, mileage irregularities, and the vehicle’s damaged status, it cannot be sold at this time. My authorized stay in the United States is nearing expiration. As a result of the seller’s actions, my company has been unable to operate and suffered serious financial losses, and I have personally incurred significant damages. I respectfully request necessary actions to protect my legal rights and address the damages suffered.I learned on September 18 that the odometer had been tampered with and that the vehicle I also respectfully request that necessary measures be taken to prevent the seller or any individuals acting similarly from engaging in such vehicle sales to others in the future, and that stricter penalties be applied. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATIO

NHTSA complaint #11717630 — an unverified report by a vehicle owner.

Bardstown, KY

ELECTRICAL SYSTEM

I have experienced this issue a few times, and so have several acquaintances who drive the same make and model of truck as I do. Whenever it rains or I go through a truck wash, the starter shifter blocked comes on the screen while driving, causing the RPMs to fluctuate and resulting in a complete loss of power to the vehicle. One dealership informed me that this is a common problem, attributed to moisture seeping into a harness located near the transmission. Tried connecting the truck to a computer so see fault codes nothing comes up because it's a glitch and clears out. This situation poses a serious risk, as it could potentially lead to a fatal accident. With no proof of the malfunction.

NHTSA complaint #11645885 — an unverified report by a vehicle owner.

East Dundee,, IL

ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL

Subject: Complaint Regarding Illegal Practices by Lemberg Group My name is [XXX] , and I am currently employed as a driver for Lemberg Group. I operate a white Freightliner Cascadia truck, unit number [XXX]. I am writing to formally report illegal practices being conducted by Lemberg Group that violate environmental regulations and federal transportation safety laws. These practices not only jeopardize public safety but also put drivers like myself in unsafe and unlawful situations. Company Information: •Company Name: Lemberg Group •USDOT Number: 2395323 •Address: 1051 E Main St, Suite 108, East Dundee, IL 60118 •Phone: (630) 626-0686 •Owner: Greg Shpak (Russian Name: Yegor Shpak) •Email: greg@lembergtrans.com Violations Reported: 1.Tampering with DEF Systems The company has intentionally disabled Diesel Exhaust Fluid (DEF) systems on certain trucks through software manipulation, violating environmental laws under the Clean Air Act and contributing to harmful emissions. •Truck Details Without DEF Systems: •Freightliner Cascadia, Unit Number [XXX], white. •Freightliner Cascadia, Unit Number [XXX], white. License Plate: [XXX] VIN: [XXX] Year: 2020 I respectfully request that the relevant authorities investigate Lemberg Group’s practices and take the necessary enforcement actions to ensure compliance with safety and environmental laws. These violations are severe and pose significant risks to public safety and the environment. Sincerely, [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA complaint #11632316 — an unverified report by a vehicle owner.

East Dundee,, IL

ENGINE

Subject: Complaint Regarding Illegal Practices by Lemberg Group My name is [XXX] , and I am currently employed as a driver for Lemberg Group. I operate a white Freightliner Cascadia truck, unit number [XXX]. I am writing to formally report illegal practices being conducted by Lemberg Group that violate environmental regulations and federal transportation safety laws. These practices not only jeopardize public safety but also put drivers like myself in unsafe and unlawful situations. Company Information: •Company Name: Lemberg Group •USDOT Number: 2395323 •Address: 1051 E Main St, Suite 108, East Dundee, IL 60118 •Phone: (630) 626-0686 •Owner: Greg Shpak (Russian Name: Yegor Shpak) •Email: greg@lembergtrans.com Violations Reported: 1.Tampering with DEF Systems The company has intentionally disabled Diesel Exhaust Fluid (DEF) systems on certain trucks through software manipulation, violating environmental laws under the Clean Air Act and contributing to harmful emissions. •Truck Details Without DEF Systems: •Freightliner Cascadia, Unit Number [XXX], white. •Freightliner Cascadia, Unit Number [XXX], white. License Plate: [XXX] VIN: [XXX] Year: 2020 I respectfully request that the relevant authorities investigate Lemberg Group’s practices and take the necessary enforcement actions to ensure compliance with safety and environmental laws. These violations are severe and pose significant risks to public safety and the environment. Sincerely, [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA complaint #11632316 — an unverified report by a vehicle owner.

East Dundee,, IL

FUEL/PROPULSION SYSTEM

Subject: Complaint Regarding Illegal Practices by Lemberg Group My name is [XXX] , and I am currently employed as a driver for Lemberg Group. I operate a white Freightliner Cascadia truck, unit number [XXX]. I am writing to formally report illegal practices being conducted by Lemberg Group that violate environmental regulations and federal transportation safety laws. These practices not only jeopardize public safety but also put drivers like myself in unsafe and unlawful situations. Company Information: •Company Name: Lemberg Group •USDOT Number: 2395323 •Address: 1051 E Main St, Suite 108, East Dundee, IL 60118 •Phone: (630) 626-0686 •Owner: Greg Shpak (Russian Name: Yegor Shpak) •Email: greg@lembergtrans.com Violations Reported: 1.Tampering with DEF Systems The company has intentionally disabled Diesel Exhaust Fluid (DEF) systems on certain trucks through software manipulation, violating environmental laws under the Clean Air Act and contributing to harmful emissions. •Truck Details Without DEF Systems: •Freightliner Cascadia, Unit Number [XXX], white. •Freightliner Cascadia, Unit Number [XXX], white. License Plate: [XXX] VIN: [XXX] Year: 2020 I respectfully request that the relevant authorities investigate Lemberg Group’s practices and take the necessary enforcement actions to ensure compliance with safety and environmental laws. These violations are severe and pose significant risks to public safety and the environment. Sincerely, [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA complaint #11632316 — an unverified report by a vehicle owner.

Burlington, IA

SERVICE BRAKES

While driving on the highway on cruise at 70mph the right front brakes locked up. The day was clear. I was driving across a bridge. The truck pulled to the right and I fought to pull it back on to the road. My company has the incident on camera. I was pulling a loaded tanker. Had the pavement been wet or snowy I could have easily jack knifed. If a vehicle would have been next to me I would have struck them. The vehicle was inspected by our mechanic and was told the system was within specs. The truck has also hard braked and pulled to the right when vehicles in the lane next to it are turning.

NHTSA complaint #11621849 — an unverified report by a vehicle owner.

Burlington, IA

FORWARD COLLISION AVOIDANCE: WARNINGS

While driving on the highway on cruise at 70mph the right front brakes locked up. The day was clear. I was driving across a bridge. The truck pulled to the right and I fought to pull it back on to the road. My company has the incident on camera. I was pulling a loaded tanker. Had the pavement been wet or snowy I could have easily jack knifed. If a vehicle would have been next to me I would have struck them. The vehicle was inspected by our mechanic and was told the system was within specs. The truck has also hard braked and pulled to the right when vehicles in the lane next to it are turning.

NHTSA complaint #11621849 — an unverified report by a vehicle owner.

Burlington, IA

FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING

While driving on the highway on cruise at 70mph the right front brakes locked up. The day was clear. I was driving across a bridge. The truck pulled to the right and I fought to pull it back on to the road. My company has the incident on camera. I was pulling a loaded tanker. Had the pavement been wet or snowy I could have easily jack knifed. If a vehicle would have been next to me I would have struck them. The vehicle was inspected by our mechanic and was told the system was within specs. The truck has also hard braked and pulled to the right when vehicles in the lane next to it are turning.

NHTSA complaint #11621849 — an unverified report by a vehicle owner.

Fontana, CA Crash

SERVICE BRAKES

A collision avoidance system (CAS), also known as a pre-crash system, forward collision warning system (FCW), or collision mitigation system, is an advanced driver-assistance system designed to prevent or reduce the severity of a collision. System applied brakes bringing our Unit to a complete stop traveling 55 MPH on an Interstate while making a lane change, Because of this our Unit was rear-ended by another CMV, On board cameras video on both V1 and V2 clearly show incident. A print out of the DDEC shows code for braking system control at exact time of incident. In our fleet we have the same 2020 Freightliner Cascadia with this system and in trying to maintain the safety of our drivers and equipment no to mention our Insurance cost and CSA scores, This is a major issue as you can see on the Web the many cases and stories of these same incidents happening. Direction is needed Thank You

NHTSA complaint #11570495 — an unverified report by a vehicle owner.

Fontana, CA Crash

FORWARD COLLISION AVOIDANCE: WARNINGS

A collision avoidance system (CAS), also known as a pre-crash system, forward collision warning system (FCW), or collision mitigation system, is an advanced driver-assistance system designed to prevent or reduce the severity of a collision. System applied brakes bringing our Unit to a complete stop traveling 55 MPH on an Interstate while making a lane change, Because of this our Unit was rear-ended by another CMV, On board cameras video on both V1 and V2 clearly show incident. A print out of the DDEC shows code for braking system control at exact time of incident. In our fleet we have the same 2020 Freightliner Cascadia with this system and in trying to maintain the safety of our drivers and equipment no to mention our Insurance cost and CSA scores, This is a major issue as you can see on the Web the many cases and stories of these same incidents happening. Direction is needed Thank You

NHTSA complaint #11570495 — an unverified report by a vehicle owner.

Fontana, CA Crash

FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING

A collision avoidance system (CAS), also known as a pre-crash system, forward collision warning system (FCW), or collision mitigation system, is an advanced driver-assistance system designed to prevent or reduce the severity of a collision. System applied brakes bringing our Unit to a complete stop traveling 55 MPH on an Interstate while making a lane change, Because of this our Unit was rear-ended by another CMV, On board cameras video on both V1 and V2 clearly show incident. A print out of the DDEC shows code for braking system control at exact time of incident. In our fleet we have the same 2020 Freightliner Cascadia with this system and in trying to maintain the safety of our drivers and equipment no to mention our Insurance cost and CSA scores, This is a major issue as you can see on the Web the many cases and stories of these same incidents happening. Direction is needed Thank You

NHTSA complaint #11570495 — an unverified report by a vehicle owner.

Milwaukee, WI Crash 1 injured

UNKNOWN OR OTHER

Semi was traveling on the highway and transporting a 48,000 pound steel coil. The steel coil was secured with 4 chains. The automatic emergency braking system engaged with nothing in front of the vehicle, causing it to suddenly come to a dead stop in traffic. This caused the steel coil to break free of its bounds, crash through the trailer and into the vehicle cab, trapping the driver.

NHTSA complaint #11547088 — an unverified report by a vehicle owner.

Milwaukee, WI Crash 1 injured

SERVICE BRAKES

Semi was traveling on the highway and transporting a 48,000 pound steel coil. The steel coil was secured with 4 chains. The automatic emergency braking system engaged with nothing in front of the vehicle, causing it to suddenly come to a dead stop in traffic. This caused the steel coil to break free of its bounds, crash through the trailer and into the vehicle cab, trapping the driver.

NHTSA complaint #11547088 — an unverified report by a vehicle owner.

Milwaukee, WI Crash 1 injured

FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING

Semi was traveling on the highway and transporting a 48,000 pound steel coil. The steel coil was secured with 4 chains. The automatic emergency braking system engaged with nothing in front of the vehicle, causing it to suddenly come to a dead stop in traffic. This caused the steel coil to break free of its bounds, crash through the trailer and into the vehicle cab, trapping the driver.

NHTSA complaint #11547088 — an unverified report by a vehicle owner.

Las Vegas, NV

SERVICE BRAKES

Ascending Tehachapi Pass CA Hwy 58 Eastbound in the left lane grossing 45,000lbs and traveling at 55mph with cruise control ON. I was passing another slower moving truck(~35-40mph). Before I came along the other vehicle the highway curved to the left. The Collision Aviodance System(CAS) didn't alarm, however the cruise control cut power and Automatic Emergency Braking(AEB) hardbraked my truck reducing the speed from 55mph to 40-45mph. This was sudden and unexpected. Once I determined the issue, I applied throttle overriding the AEB/CAS. However my forward momentum was lost and accelerating uphill was slow. It was midday and clear skies. No one was following me fortunately, but sudden and unexpected braking could have had a vehicle tailing too closely(It was an uphill grade with a speed limit of 65 mph for POV) rear-end my trailer(48 foot stepdeck trailer). Please explain to me how CAS/AEB are safety systems for a CMV?!? This is the 4th report I have filed with NHTSA about the same Freightliner Cascadia tractor. According to the vehicle operating Manual that this occurrence of unexplained and unwarranted braking is a "feature" of this "safety system". Meaning that the CAS/AEB was functioning as designed(A flawed designed in my professional opinion). I have been contacted by the NHTSA about previous filed report about an ongoing investigation with the manufacturer. What action is this agency going to take? Will there be an investigation when the system performs as designed causing an avoidable accident, injury, or death? Will I be a defendant, witness, or victim? Sincerely, [XXX] Junction City, Oregon INFORMATION Redacted PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6).

NHTSA complaint #11522762 — an unverified report by a vehicle owner.

Las Vegas, NV

FORWARD COLLISION AVOIDANCE: WARNINGS

Ascending Tehachapi Pass CA Hwy 58 Eastbound in the left lane grossing 45,000lbs and traveling at 55mph with cruise control ON. I was passing another slower moving truck(~35-40mph). Before I came along the other vehicle the highway curved to the left. The Collision Aviodance System(CAS) didn't alarm, however the cruise control cut power and Automatic Emergency Braking(AEB) hardbraked my truck reducing the speed from 55mph to 40-45mph. This was sudden and unexpected. Once I determined the issue, I applied throttle overriding the AEB/CAS. However my forward momentum was lost and accelerating uphill was slow. It was midday and clear skies. No one was following me fortunately, but sudden and unexpected braking could have had a vehicle tailing too closely(It was an uphill grade with a speed limit of 65 mph for POV) rear-end my trailer(48 foot stepdeck trailer). Please explain to me how CAS/AEB are safety systems for a CMV?!? This is the 4th report I have filed with NHTSA about the same Freightliner Cascadia tractor. According to the vehicle operating Manual that this occurrence of unexplained and unwarranted braking is a "feature" of this "safety system". Meaning that the CAS/AEB was functioning as designed(A flawed designed in my professional opinion). I have been contacted by the NHTSA about previous filed report about an ongoing investigation with the manufacturer. What action is this agency going to take? Will there be an investigation when the system performs as designed causing an avoidable accident, injury, or death? Will I be a defendant, witness, or victim? Sincerely, [XXX] Junction City, Oregon INFORMATION Redacted PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6).

NHTSA complaint #11522762 — an unverified report by a vehicle owner.

Las Vegas, NV

FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING

Ascending Tehachapi Pass CA Hwy 58 Eastbound in the left lane grossing 45,000lbs and traveling at 55mph with cruise control ON. I was passing another slower moving truck(~35-40mph). Before I came along the other vehicle the highway curved to the left. The Collision Aviodance System(CAS) didn't alarm, however the cruise control cut power and Automatic Emergency Braking(AEB) hardbraked my truck reducing the speed from 55mph to 40-45mph. This was sudden and unexpected. Once I determined the issue, I applied throttle overriding the AEB/CAS. However my forward momentum was lost and accelerating uphill was slow. It was midday and clear skies. No one was following me fortunately, but sudden and unexpected braking could have had a vehicle tailing too closely(It was an uphill grade with a speed limit of 65 mph for POV) rear-end my trailer(48 foot stepdeck trailer). Please explain to me how CAS/AEB are safety systems for a CMV?!? This is the 4th report I have filed with NHTSA about the same Freightliner Cascadia tractor. According to the vehicle operating Manual that this occurrence of unexplained and unwarranted braking is a "feature" of this "safety system". Meaning that the CAS/AEB was functioning as designed(A flawed designed in my professional opinion). I have been contacted by the NHTSA about previous filed report about an ongoing investigation with the manufacturer. What action is this agency going to take? Will there be an investigation when the system performs as designed causing an avoidable accident, injury, or death? Will I be a defendant, witness, or victim? Sincerely, [XXX] Junction City, Oregon INFORMATION Redacted PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6).

NHTSA complaint #11522762 — an unverified report by a vehicle owner.

Kansas City, MO

ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL

The computer system that logs and keeps track of hours is not working properly. The wires are I guess are messed up. Is that dangerous? My hubby works at the Walmart dc and he said a girl slipped and got a bad spinal injury from the flooring not being non-skid.

NHTSA complaint #11521957 — an unverified report by a vehicle owner.

Junction City, OR

SERVICE BRAKES

On Off ramp I-40 W Segliman, AZ there was a cattle guard 10 feet before Stop sign. I was braking for Stop Sign. AEB(aka CAS Collision Aviodance System) detected the cattle guard grate as obstruction, not something flat of the pavement, and apply maximum braking(Note: I was already braking). It had been snowing that night thou at this location the road was dry. Unnecessary panic braking by automated system can cause lose of control of vehicles on wet and icy surfaces. How is it safe for the AEB/CAS system to over ride the operator's action? Doesn't the CDL driver who is a trained and licensed professional have the ability to identify and take appropriate action, in this case a cattle guard grate wasn't a safety concern, whether to brake or avoid the obstacle? I have had numerous instances that I have and haven't reported to NHTSA of the deficiencies of the AEB/CAS falsely reading the conditions and taking the incorrect action. Sincerely, [XXX] AX Transportation INFORMATION Redacted PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6).

NHTSA complaint #11513719 — an unverified report by a vehicle owner.

Junction City, OR

FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING

On Off ramp I-40 W Segliman, AZ there was a cattle guard 10 feet before Stop sign. I was braking for Stop Sign. AEB(aka CAS Collision Aviodance System) detected the cattle guard grate as obstruction, not something flat of the pavement, and apply maximum braking(Note: I was already braking). It had been snowing that night thou at this location the road was dry. Unnecessary panic braking by automated system can cause lose of control of vehicles on wet and icy surfaces. How is it safe for the AEB/CAS system to over ride the operator's action? Doesn't the CDL driver who is a trained and licensed professional have the ability to identify and take appropriate action, in this case a cattle guard grate wasn't a safety concern, whether to brake or avoid the obstacle? I have had numerous instances that I have and haven't reported to NHTSA of the deficiencies of the AEB/CAS falsely reading the conditions and taking the incorrect action. Sincerely, [XXX] AX Transportation INFORMATION Redacted PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6).

NHTSA complaint #11513719 — an unverified report by a vehicle owner.

Akron, PA

UNKNOWN OR OTHER

In this truck, and in other CMVs with down-facing exhaust, and with complete aerodynamic panels, exhaust gases are trapped under the body, and are circulated into the cab. Much worse when parked, but noticeable when driving. I can smell regen soot in the cab when moving at highway speed, meaning that exhaust is getting from the exhaust pipe to the cab interior. This vehicle VIN has this problem, but i have found it to be present in most other newer models of CMV, to varying degrees. The style of exhaust that ends above the roofline (vertical stacks) do not present this problem. This particular vehicle has no auxiliary power unit, so when idling is necessary, enough exhaust makes it in the cab to cause coughing. The down facing exhaust design, coupled with aerodynamic panels that trap and funnel exhaust gases to the interior of the cab, are a critical design flaw. CMV drivers are constantly breathing varying levels of exhaust gases, even when driving. I have thermal videos of exhaust, from a parked truck, moving from the tailpipe forward to under the hood. Every gas under the hood and sleeper body ends up in the cab and sleeper. As a test, fluorescent leak detecting liquid could be aerosolized into the exhaust stream near the end of the tailpipe, or outside the tailpipe near the exhaust pipe opening. After idlng for a while, and after driving with the leak detection liquid being sprayed, a black light could be used to show everywhere the gases go. Drivers cannot idle the trucks nor drive down the road without being firced to breathe exhaust for up to 20+ hours a day. These gases, including the burnt regen gases/soot, are bad for the worker's health, and can impair cognitive function. Also, this is a clear violation of DOT and EPA safety rules for CMVs. Since the DOT rules state that exhaust cannot be expelled under the hood or cab/sleeper, the exhaust is designed to come out a few inches behind the sleeper. The exhaust still comes into the cab.

NHTSA complaint #11509676 — an unverified report by a vehicle owner.

Kennewick, WA

VEHICLE SPEED CONTROL

Multiple safety issues with truck #1 When driving & using cruise control (CC) at 60 mph & truck is at that speed (60 mph) truck is moving from top speed to E coast mode. Immediately RPM is down (from 1250 to 600) & steering wheel is much harder b/c reduced power from engine . Response time for driver to avoid potential hazardous situations on the road (i.e. animals, rocks, trees, etc.) is longer & not safe #2 This problem is related to when truck is in regen. In driving, and when truck is doing regen (visible on the dash: high temp light/ icon). CC set to (60 mph) when truck is at that speed (60 mph) truck goes to E coast mode. RPM is going down to 600 RPM which is not adequate engine speed to finish regen. With regen interrupted there is a lot of white smoke under the truck and red light for engine shut down is on the dash. There is 30 seconds time to override shut down but at the same time the driver needs to safely park the truck on the shoulder, on a busy highway, with reduced power and steering wheel (600 RPM or no power at all because engine shut down). With high DPF temperature,there is potential for fire (truck,grass,trees ). I am told engine shut down was caused by interrupted regen process. #3 Collision warning is coming with no reason, and can activate active brake, at high speed. Radar malfunction (snow, ice in the front)can cause malfunction to adaptive cruise control, active brake assist, & malfunction other safety features. Combination of malfunction (radar, active break assist, collision warning, IPM [intelligent powertrain management], engine break not engaging) can cause dangerous acceleration for heavy loaded truck. I contacted DTNA (Daimler Truck North America) in regard to these issues & am told in order to solve these issues the truck should be inspected where mechanics and programmers are involved. At the same time I spoke with the company I work for about safety issues with those trucks. You can contact me for further information.

NHTSA complaint #11505866 — an unverified report by a vehicle owner.

Kennewick, WA

STEERING

Multiple safety issues with truck #1 When driving & using cruise control (CC) at 60 mph & truck is at that speed (60 mph) truck is moving from top speed to E coast mode. Immediately RPM is down (from 1250 to 600) & steering wheel is much harder b/c reduced power from engine . Response time for driver to avoid potential hazardous situations on the road (i.e. animals, rocks, trees, etc.) is longer & not safe #2 This problem is related to when truck is in regen. In driving, and when truck is doing regen (visible on the dash: high temp light/ icon). CC set to (60 mph) when truck is at that speed (60 mph) truck goes to E coast mode. RPM is going down to 600 RPM which is not adequate engine speed to finish regen. With regen interrupted there is a lot of white smoke under the truck and red light for engine shut down is on the dash. There is 30 seconds time to override shut down but at the same time the driver needs to safely park the truck on the shoulder, on a busy highway, with reduced power and steering wheel (600 RPM or no power at all because engine shut down). With high DPF temperature,there is potential for fire (truck,grass,trees ). I am told engine shut down was caused by interrupted regen process. #3 Collision warning is coming with no reason, and can activate active brake, at high speed. Radar malfunction (snow, ice in the front)can cause malfunction to adaptive cruise control, active brake assist, & malfunction other safety features. Combination of malfunction (radar, active break assist, collision warning, IPM [intelligent powertrain management], engine break not engaging) can cause dangerous acceleration for heavy loaded truck. I contacted DTNA (Daimler Truck North America) in regard to these issues & am told in order to solve these issues the truck should be inspected where mechanics and programmers are involved. At the same time I spoke with the company I work for about safety issues with those trucks. You can contact me for further information.

NHTSA complaint #11505866 — an unverified report by a vehicle owner.

Kennewick, WA

FORWARD COLLISION AVOIDANCE: WARNINGS

Multiple safety issues with truck #1 When driving & using cruise control (CC) at 60 mph & truck is at that speed (60 mph) truck is moving from top speed to E coast mode. Immediately RPM is down (from 1250 to 600) & steering wheel is much harder b/c reduced power from engine . Response time for driver to avoid potential hazardous situations on the road (i.e. animals, rocks, trees, etc.) is longer & not safe #2 This problem is related to when truck is in regen. In driving, and when truck is doing regen (visible on the dash: high temp light/ icon). CC set to (60 mph) when truck is at that speed (60 mph) truck goes to E coast mode. RPM is going down to 600 RPM which is not adequate engine speed to finish regen. With regen interrupted there is a lot of white smoke under the truck and red light for engine shut down is on the dash. There is 30 seconds time to override shut down but at the same time the driver needs to safely park the truck on the shoulder, on a busy highway, with reduced power and steering wheel (600 RPM or no power at all because engine shut down). With high DPF temperature,there is potential for fire (truck,grass,trees ). I am told engine shut down was caused by interrupted regen process. #3 Collision warning is coming with no reason, and can activate active brake, at high speed. Radar malfunction (snow, ice in the front)can cause malfunction to adaptive cruise control, active brake assist, & malfunction other safety features. Combination of malfunction (radar, active break assist, collision warning, IPM [intelligent powertrain management], engine break not engaging) can cause dangerous acceleration for heavy loaded truck. I contacted DTNA (Daimler Truck North America) in regard to these issues & am told in order to solve these issues the truck should be inspected where mechanics and programmers are involved. At the same time I spoke with the company I work for about safety issues with those trucks. You can contact me for further information.

NHTSA complaint #11505866 — an unverified report by a vehicle owner.

at 400,000 miles Defiance, OH

ELECTRICAL SYSTEM

The contact owns a 2020 Freightliner Cascadia. The contact stated that while driving at various speeds, the low tire pressure alarm sounded at 120 PSI. The contact stated that there was an abnormal buzzing sound detected. The contact stated that the air pressure alert should engage at 60 PSI. The vehicle was taken to the dealer however, the mechanic was unable to duplicate the failure. The vehicle was not diagnosed or repaired. The manufacturer was not contacted. The failure mileage was approximately 400,000.

NHTSA complaint #11498496 — an unverified report by a vehicle owner.