2021 RAM 1500 engine problems

ENGINE

Recently this vehicle has triggered a check engine light. Upon further examination the code was related to an ignition #3. (CODES: P020C, PO1DO).

NHTSA complaint #11753305 — an unverified report by a vehicle owner.

ENGINE

MGU unit failed / car seized in the middle of the road - sent in to be repaired Unsafe to be stuck in the middle of the road, could not even put the car in neutral to push out of the road Known problem that RAM and Stellantis know about and are not placing warnings. We were told by the dealership we were 5,000 in line for a new part and that it would take a year. No warnings, truck ran perfectly before

NHTSA complaint #11752289 — an unverified report by a vehicle owner.

ENGINE

On 6/9/2010 I was accelerating up a ramp to merge with traffic on Rt146 north . I had reached the top of the ramp and as I viewed the oncoming traffic behind in the mirror I began to shift into the right lane. Suddenly the engine light started flashing, my truck immediately lost power and slowed to 40mph. The truck that had been well behind me was suddenly swerving to avoid my truck . I nearly got rear ended by a truck which would have probably killed my daughter and I.We both were in shock , I pulled over as soon as I could .Does someone need to be killed before action is taken. Safety should prevent incidents like this . Hindsight is no good. I think my kids are precious but Dodge must think their lives are cheap . That was something the engine manufacturer should be held accountable for. The rocker arms and lifters suddenly stopped working in two cylinders because of a fault in those engines known to Dodge. The dealership diagnosed the issue and gave me a quote of $4500-$6000 to repair the extensive damage from that incident. The lady in the service department said I was a victim of the well known Pentastar Tick .I can’t afford it. To add insult they offered me $6000 to buy it. No local independent mechanic wants to tear the engine apart . So my truck is sitting in our driveway. I am paying a loan and upside down in it. I can’t fix it and I can’t sell it. I have made every payment. I am certain there are other dodge customers who have been in close calls or worse over their vehicle suddenly losing power . Isn’t this the perfect example of dangerous . I think so.

NHTSA complaint #11747300 — an unverified report by a vehicle owner.

ENGINE

Loud winning sounds in engine, louder during excelleration. Dealer service center found the eTorque to be bad and i was told not to drive it. And there is no fix or parts for it. Not sure when or if they will get the parts. No recall no part no fix!!

NHTSA complaint #11747020 — an unverified report by a vehicle owner.

ENGINE

I purchased a 2021 Ram 1500 North Edition (VIN: [XXX]) on XXX. As of last week, I noticed fluid leaking from under the engine compartment of the truck. I crawled under the truck and found that this five-year old truck has an oil pan that has rusted and rotted on the bottom and side leading to a leak of motor oil. I searched this online and found that this is a common issue amongst this model in this time frame and that it can cause a "catastrophic" loss of oil pressue while driving. I checked recalls and technical service bulletins and found no mention of this issue. Upon speaking with the service department of Hume's Chrysler, Jeep Dodge, and Ram of Waterford, PA, I was informed that they have seen this issue and that it is not covered by any warranty or recall because it's always caused by rust. This was only noticed because my wife's vehicle is in the shop and I parked in the garage causing me to notice it on the garage floor. My truck is normally parked in our gravel driveway and the oil leak went unnoticed. The truck was down approximately one-quart of oil when this was noticed. Had this not been noticed when it was, I fear that this issue could have caused an incident on the highway while the engine oil pressure was increased. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA complaint #11743214 — an unverified report by a vehicle owner.

ENGINE

Both exhaust manifold cracked causing exhaust fumes to leak in to cab

NHTSA complaint #11742815 — an unverified report by a vehicle owner.

ENGINE AND ENGINE COOLING:EXHAUST SYSTEM

The contact owns a 2021 Ram 1500. The contact stated while driving at an undisclosed speed, there were abnormal sounds coming from the exhaust, the exhaust was leaking, and the contact discovered that there were cracks on the exhaust manifolds. No warning lights were illuminated. The vehicle was taken to a dealer where it was diagnosed that the exhaust manifolds and gasket needed to be replaced. The vehicle was repaired. The contact did research and was made aware of an unknown NHTSA Campaign Number however, the VIN was not included. The manufacturer was made aware of the failure and the manufacturer stated that NHTSA was responsible for adding each VIN to a recall. The failure mileage was approximately 80,000.

NHTSA complaint #11742065 — an unverified report by a vehicle owner.

ENGINE

Made several stops and on the last one when I went to start the vehicle it wouldn't start. Used jump pack and it started. Had a non-flashing check engine light and a service ESC light. Decided to drive across town to auto store and have them check battery and replace if bad, When I pulled into the auto store parking lot the truck died and wheels locked up. (Very sudden stop) All four gear selector lights (PRND) were lit. Thought to myself "I'm glad this didn't happen on the roadway." Turns out the battery was indeed bad, and a new battery got me running again.

NHTSA complaint #11739206 — an unverified report by a vehicle owner.

ENGINE

The exhaust manifold on both sides of the motor have cracked and have broken bolts. The Ram dealer confirmed it and says it is a known issue that the manufacturer will not fix. With the crack and broken bolts, exhaust fumes are leaking out. It gets nauseating in the cab of the truck if the windows are up for too long. My independent mechanic is set to replace the manifolds with aftermarket ones due to literature saying the OEM will end up the same way. No dash lights have illuminated.

NHTSA complaint #11737488 — an unverified report by a vehicle owner.

ENGINE

The vehicle experienced an overheating condition immediately after being picked up from dealership service on April 11, 2026. Within a short distance of driving, a warning appeared and the vehicle became unsafe to operate, requiring it to be pulled over and towed. The dealership later stated that coolant was low but also reported no leaks. This condition should have been identified and corrected while the vehicle was in their custody prior to release. The failure created a safety risk because the vehicle could not be operated safely on the roadway and required immediate removal from traffic. The issue occurred without prior warning before the failure following service.

NHTSA complaint #11733482 — an unverified report by a vehicle owner.

ENGINE

The contact owns a 2021 Ram 1500. The contact stated that while driving at an undisclosed speed, the contact noticed an unusual popping sound. The low battery and check engine warning lights were illuminated. In addition, the battery lost power. The vehicle was driven to the shoulder of the road, and the vehicle was turned off. The contact stated that while attempting to restart the vehicle, the vehicle failed to restart. The vehicle was towed to the residence. The vehicle was not diagnosed or repaired by an independent mechanic or the dealer. The dealer was made aware of the failure. The contact was informed that the failure was a known failure with the vehicle. The manufacturer was made aware of the failure, and a case was filed. The failure mileage was approximately 78,900.

NHTSA complaint #11729935 — an unverified report by a vehicle owner.

ENGINE

The EGR cooler bypass control broke on my pickup. The dealership stated that this is an ongoing issue with these pickups and that the 2019-2020 pickups had a recall on this. This pickup has 77,000 miles on it. This should not be failing.

NHTSA complaint #11728961 — an unverified report by a vehicle owner.

ENGINE

Our alternator is bad in a 2021 Ram. There are 10,000 on back order and up to a 9 -12 month wait list. There is obviously something wrong with this brand and should be recalled.

NHTSA complaint #11726592 — an unverified report by a vehicle owner.

ENGINE

Engine malfunction cause low oil pressure and cause a catastrophic failure and lock brakes up multiple people i know have had same issue as me and it due to a manufacturer error on oil gallery bolts backing out and causes rockers not to get proper oil and chews cams up

NHTSA complaint #11726139 — an unverified report by a vehicle owner.

ENGINE

Wa driving with cruise on at 60 mph. Truck stalled with no notice, no warning lights or check engine light. All temperatures and pressures seemed okay at time of incident. Could not move electronic shifter into neutral, was stuck in drive. Alarm came up to shift to park, I did not shift due to moving at 55mph at this time. Coasted to a stop on side of the road. At about 2-3 mph, truck automatically shifted to park. I attempted to restart truck but engine just cranked over with no fire. Attempted 3 times and still nothing. Waited 20-30 min and attempted again and same result. Call for tow truck and had towed to dealership. While waiting for tow truck, had full power in truck, no warning lights. Checked fuses for fuel and found no issues. Did hear fuel pump engage when turned ignition to run. Checked oil level, oil was changed 800 miles prior to incident, oil was at full level on dip stick.

NHTSA complaint #11724312 — an unverified report by a vehicle owner.

ENGINE

The oil pan on my 2021 Ram1500 has premature severe corrosion. When the oil pan fails, oil will drain to the roadway causing hazard to other vehicles and cause catastrophic engine damage disabling the vehicle. I tried to contact Ram about the issue to raise concern about this material failure and they would not take my concern/complaint. A quick search reveals this problem is extremely common. The repair quote is slightly over 1500 to replace the oil pan. Something needs to be done. A recall needs issued and a fix provided for all affected vehicles.

NHTSA complaint #11719659 — an unverified report by a vehicle owner.

ENGINE

MGU unit failure. Truck is less than 5 years old and just hit 60k miles. Noise came on very abruptly and was lucky enough to get it to a dealer nearby where I was traveling. Still was stranded 4 hours from home and needed a rental to get home. I got a battery warning light and auto start/stop malfunction light and 20 minutes later the truck was dead. I have a family of 5 and need a vehicle for work and to transport kids to school/daycare. Technician said it could take upwards of 8 months to get the replacement part. This is absolutely ludacris for something like this to happen and potentially causing financial damages to people. Dealer offered $10k less than the truck is worth because of the issue so I can’t even get a fair trade in value if I wanted to trade it in. Ridiculous!

NHTSA complaint #11718352 — an unverified report by a vehicle owner.

ENGINE

The Check Engine Light came on and the truck would misfire and stall. We took it to 2 separate mechanics - Mechanic 1 (Certified Sideros Automotive): It was found that the multiple cam shaft lobes were flattened and ground due to a failed lifter, recommendation - replace engine. Mechanic 2 (Stew Hansens Ram): Check Engine Light came on, multiple cylinder miss fire. Using a bore scope inspected cylinder walls, found a very small crak allowing coolant to slowly bleed into the system, recommendation - replace engine We replaced the engine with a rebuilt engine at a cost of $7,677.58. This should not happen to a truck that is only 4 years old. Its a 2021 and the engine was replaced 5/2025. We were not aware of any recalls but we did have the dealership clear all recalls on the new engine such as the engine software update after it was installed.

NHTSA complaint #11718086 — an unverified report by a vehicle owner.

ENGINE

I am submitting this complaint to report a significant and unusual mechanical failure involving my 2021 Ram truck. The vehicle experienced a failure of the heater core assembly, which resulted in engine coolant leaking directly into the passenger compartment. This failure caused coolant odor and fluid intrusion inside the cabin and required extensive disassembly of the dashboard and HVAC system to repair. The total cost of repairs exceeded $5,300, which I believe is disproportionate and unexpected for a vehicle of this age and mileage. Two separate repair visits were required as it was found after the heater core was replaced the actuator on the driver’s side was damaged by the ongoing leak and required repair. The vehicle has been properly maintained and serviced according to manufacturer recommendations. While this incident did not result in an immediate crash or injury, the nature of the failure raises safety and health concerns, including: •Driver distraction due to coolant fumes and loss of defrost capability •Exposure of occupants to engine coolant within the enclosed passenger compartment •Sudden loss of cabin heating and windshield defogging capability in cold weather Given the age of the vehicle and the severity of the failure, this does not appear to be normal wear and tear. I am concerned that this may represent a design, material, or manufacturing defect that could affect other vehicles of the same model year. The odor was present for many months prior to the failure; however, the local dealership could not examine the issue at the time of a prior oil change due to lack of time on that visit. I am submitting this report to document the issue, assist in identifying potential patterns, and ensure appropriate review by the manufacturer and regulatory authorities. Repair invoices and supporting documentation are included.

NHTSA complaint #11714891 — an unverified report by a vehicle owner.

ENGINE

The contact owns a 2021 Ram 1500. The contact stated that while driving 55-60 MPH, the vehicle stalled. There were no warning lights illuminated. The vehicle was taken to the local dealer, who replaced the high-pressure fuel pump under NHTSA Campaign Number: 22V767000 (Fuel System, Gasoline, Engine); with the additional repairs on the low-pressure fuel pump at the Owner's expense. The vehicle was partially repaired. The manufacturer was contacted and opened an investigation. The failure mileage was approximately 102,000.

NHTSA complaint #11713579 — an unverified report by a vehicle owner.

ENGINE

Exhaust manifold on passenger side has cracked leading to exhaust fumes in cabin, causing dizziness and headaches due to carbon monoxide ram has acknowledged this issue with a TSB but the fact that exhaust fumes come into the cabin on a vehicle that is five years old is concerning and in my opinion, a safety concern.

NHTSA complaint #11704281 — an unverified report by a vehicle owner.

ENGINE

eTorque MGU hybrid motor going out with unexpected loss of power and stopping. Upon failure vehicle lost power and became inoperable. Both independent service center and dealer service center confirmed the eTorque MGU hybrid motor is failing. Upon further research thousands of these MGU hybrid motors are failing unexpectedly. No remedy in sight and manufacturer indicates no eta on availability of parts to fix.

NHTSA complaint #11694047 — an unverified report by a vehicle owner.

ENGINE

Oil pans are rusting through . Mine has 45,053 miles. In the 60k mile powertrain warranty. RAM refuses to fix because it is 'corrosion'. They want $1,861.53 to replace. These rusted pans are all over the internet.

NHTSA complaint #11693388 — an unverified report by a vehicle owner.

ENGINE

While towing, my truck threw P00AF-00 Turbocharger Boost Control Module "A" Performance and ABS C121C-00 Torque Request Signal Denied codes and I lost power due to turbocharger not engaging. Alarms that were lit included CEL, Service Electronic Throttle Control, and the Stabilizer system. The safety aspect is the loss of power while towing on a highway. The original code was cleared by my hometown dealer and vehicle ran well. 130 miles later it happened again, cleared by dealer in Parkersburg WV On the way home it happened a 3rd time. After parking for half an hour the alarm lights went off and I had full power. A day later the CEL also went off leaving no evidence of a problem on my dash. The vehicle is scheduled at the local dealer tomorrow (9/29/25) The trailer and truck combination was well within the towing limits of the vehicle. There are various threads in RAM owner groups that allude to this problem in the Gen 3 Ecodiesel The truck is under an extended warranty from MOPAR...hope they resolve the problem

NHTSA complaint #11690166 — an unverified report by a vehicle owner.

ENGINE

Failed Motor Generator @ 74,000 miles while is covered under the Federal emissions warranty. Vehicle has been off road for 30 days with no ETA on replacement parts

NHTSA complaint #11689574 — an unverified report by a vehicle owner.

ENGINE

There is an exhaust leak at the manifold which lets exhaust gas int the engine compartment and it smells in the passenger compartment. I feel there is a health risk of carbon monoxide poisoning . It seems as though should be a repair made by the manufacturer.

NHTSA complaint #11687846 — an unverified report by a vehicle owner.

ENGINE

1. The Motor Generator Unit (MGU) failed on my 2021 Ram 1500. The component is still installed in the vehicle and is available for inspection upon request. 2. The MGU failure caused a loud whining noise that worsened over two weeks, raising concern that the part could seize or fail while driving. A sudden failure could result in loss of vehicle power or drivability, creating a dangerous situation for me and others on the road. 3. Yes. A certified Ram dealership inspected my vehicle and officially diagnosed the MGU as defective. 4. Yes, the dealership confirmed the failure. To my knowledge, it has not been inspected by the manufacturer, police, or insurance representatives. 5. There were no warning lamps or dashboard messages. The only symptom was a whining noise that started faintly and gradually increased over the course of approximately two weeks before the dealer diagnosis.

NHTSA complaint #11687888 — an unverified report by a vehicle owner.

ENGINE

I have a 2021 ram 1500 and the belt started to make a lot of noise. I got it to the dealership and they had it a whole month and a half. They said it was the alternator but no it was something called a MGU (motor generator unit). Can't find it no where in the country. Im stuck with a 50k truck that I can drive. Warranty can't fix it and now I can't sleep.

NHTSA complaint #11686072 — an unverified report by a vehicle owner.

ENGINE

Driving to work and my truck lost all electrical power. All display lights turned on and hazard light signal started blinking but the hazard lights were not actually on. I then lost all electrical power; power steering, hazard lights would not turn on, all dash lights and display lights, head lights at first and then the battery died a couple minutes after that started. I could not put the truck into neutral so I could push it to the shoulder of the highway. I had to put it in Neutral manually with the pull tab under the steering wheel. My Ram 1500 5.7L hemi etorque was towed to Andy Mohr Chrysler Jeep Ram. The service shop told me that the motor generator unit is on back order and it could take a month or 2 months for the part to come in.

NHTSA complaint #11682057 — an unverified report by a vehicle owner.