Mazda CX-70 driver assist problems

LANE DEPARTURE: BLIND SPOT DETECTION

Phantom Blind Spot Monitoring occurred while driving 70-73mph. Right driver side blind spot turns on for almost 5 minutes with no other vehicles around. Switching lanes causes lane departure warning system to activate.

NHTSA complaint #11754344 — an unverified report by a vehicle owner.

FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING

Vehicle Information I am reporting multiple persistent safety-related defects in my 2025 Mazda CX-70 that began immediately after purchase and continue despite repeated service visits, software updates (including MSP66 on July 9, 2026), and good-faith repair attempts. These defects substantially impair the vehicle’s safety, drivability, reliability, and security. • Warning Lights & Phantom Braking: Brake messages and related warnings on the cluster appeared on the drive home from the dealership shortly after purchase, even with no obstacles present. Intermittent false warnings have continued. • Shifter / Transmission Behavior & Hard Shifting: Intermittently fails to engage Drive after Neutral (especially after car washes). The shifter moves to D but the vehicle remains in Neutral. Notable hard shifting and intermittent poor power acceleration have also been observed. Video evidence provided to dealer. • Door Lock & Latch Failures: Doors intermittently fail to lock or unlock via key fob or interior switches. Doors sometimes do not open when pulling handles. Auto-lock does not always engage. I have observed the vehicle automatically lock (audible sound and folding mirrors) only for it to be found unlocked the next morning. Passengers have been trapped inside on multiple occasions. These issues raise serious entrapment, safety, and theft concerns. • Hybrid System / i-Stop Malfunctions: Repeated MyMazda app alerts for “Hybrid system malfunction. Vehicle would not restart from I-Stop shut down causing me to have to put it back into park and restart the vehicle. • i-Active system failures: The i-Active system occasionally disengages even during clear weather. Dealership states this can sometimes happen due to direct sunlight and sensors? • During a previous discussion with Mazda Customer Care, they stated that they notes a previous power train failure on their end which I was unaware of.

NHTSA complaint #11752344 — an unverified report by a vehicle owner.

LANE DEPARTURE: BLIND SPOT DETECTION

Blind Spot Monitor detecting phantom objects at highway speeds with no other vehicles around. Speeds between 69-75mph. Right Passenger side blind spot light turns for up to 20 seconds, turns off, then turns on again.

NHTSA complaint #11751437 — an unverified report by a vehicle owner.

LANE DEPARTURE: ASSIST

Multiple instances while driving on the highway with cruise control and lane keep assist on - on a bend slight turn the car veered into the other lane across the lane lines - even with other cars present. Additionally, it does not auto steer away from a blind spot collision - had I not noticed the car there would have been an accident.

NHTSA complaint #11749876 — an unverified report by a vehicle owner.

LANE DEPARTURE: BLIND SPOT DETECTION

Multiple instances while driving on the highway with cruise control and lane keep assist on - on a bend slight turn the car veered into the other lane across the lane lines - even with other cars present. Additionally, it does not auto steer away from a blind spot collision - had I not noticed the car there would have been an accident.

NHTSA complaint #11749876 — an unverified report by a vehicle owner.

FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL

This happens often. On a trip to Florida of 1200 miles, it happened 12 times each way. After being slowed in the right lane by a car in front driving slower tan my set cruise speed, I signal and move to an empty (in front of me) left lane. Instead of accelerating to resume my set cruise speed, the car decelerates abruptly by as much as 10 mph. If a car is following me and most logically is expecting me to accelerate after moving to the left lane, that car's driver is surprised and risks rear ending me. I took the car in to service this issue. Mazda has a Service Alert (SA-007/24. The conclusion of the SA is basically it is what it is. I think that this is a serious safety issue. I have a 2016 Subaru Outback with adaptive cruise control and it never does this. Maxda's system is deficient. The NHTSB should analyze and compare adaptive cruise control systems.

NHTSA complaint #11746021 — an unverified report by a vehicle owner.

LANE DEPARTURE: BLIND SPOT DETECTION

There have been several false blind spot monitoring alerts since I received vehicle. It seems to get worse with time. Now on freeway trips it’s almost constant leaving no trust with alerts

NHTSA complaint #11740984 — an unverified report by a vehicle owner.

FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL

This has occurred numerous times. Using the adaptive cruise control, the vehicle decelerates as I approach a slower moving vehicle. That is what it should do. When I move from the right lane to the open left lane, instead of accelerating back to the set cruise speed, the car decelerates as much as 10 mph before finally regaining its mind and accelerating to the set speed. I have had cars following me that are expecting my car to accelerate that are surprised that the car decelerates. This happens on straight roads with no car ahead of me in the left lane.

NHTSA complaint #11740937 — an unverified report by a vehicle owner.

FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING

The vehicle has engaged the automatic braking feature multiple times while in a parking garage and when in the middle of a four-way stop despite there being no cross traffic or moving vehicles around my vehicle. In two instances, there was a vehicle behind mine that the breaking could have led to me being rear-ended and in the case of the four-way stop, there were other vehicles waiting to cross that could have hit me from behind or on the side. The vehicle was taken to the local Mazda dealership who had the vehicle for approximately 3 weeks trying to identify a fix and was subsequently told to pick up the vehicle without a fix being performed. I was informed after that time that Mazda was aware of this being an issue for multiple owners but did not have a solution to resolve it. I was told to wait to be contracted at some point in the future about an identified repair or recall. This is a serious safety issue that could lead to a collision and Mazda has stated that they do not have a solution to the problem.

NHTSA complaint #11736754 — an unverified report by a vehicle owner.

FORWARD COLLISION AVOIDANCE: WARNINGS

The vehicle has engaged the automatic braking feature multiple times while in a parking garage and when in the middle of a four-way stop despite there being no cross traffic or moving vehicles around my vehicle. In two instances, there was a vehicle behind mine that the breaking could have led to me being rear-ended and in the case of the four-way stop, there were other vehicles waiting to cross that could have hit me from behind or on the side. The vehicle was taken to the local Mazda dealership who had the vehicle for approximately 3 weeks trying to identify a fix and was subsequently told to pick up the vehicle without a fix being performed. I was informed after that time that Mazda was aware of this being an issue for multiple owners but did not have a solution to resolve it. I was told to wait to be contracted at some point in the future about an identified repair or recall. This is a serious safety issue that could lead to a collision and Mazda has stated that they do not have a solution to the problem.

NHTSA complaint #11736754 — an unverified report by a vehicle owner.

LANE DEPARTURE: LANE KEEP: AUTOMATIC STEERING

The contact owns a 2025 Mazda CX-70. The contact stated that while driving on several occasions at various speeds with the Lane Keep Assist feature deactivated, the steering wheel jerked to the left. The vehicle was towed to a dealer, and the failure was being investigated. The vehicle was not yet repaired. The manufacturer was notified of the failure, and a complaint was filed. The failure mileage was approximately 19,000.

NHTSA complaint #11731379 — an unverified report by a vehicle owner.

LANE DEPARTURE: ASSIST

Lane assist system acts on it's own and attempts to override my input. It can be very jarring especially at high speeds. I notice the issue mostly when I'm on the highway/freeway and attempting to lane change or take an exit ramp. The system trys to correct my steering and I have to briefly fight against it to maintain control.

NHTSA complaint #11730348 — an unverified report by a vehicle owner.

LANE DEPARTURE: ASSIST

I purchased a Certified Pre-Owned Mazda CX-70 that exhibits intermittent and unpredictable steering behavior, creating a significant safety concern. The steering will intermittently stiffen and then pull the vehicle left or right without driver input, at times toward oncoming traffic or the breakdown lane, requiring immediate correction. On straight roads, the vehicle does not consistently track and will drift unpredictably. When driving over minor road variations (such as small bumps or frost heaves), the steering wheel may jerk suddenly in the opposite direction. The vehicle also intermittently behaves as though lane-keeping assistance is active—auto-correcting relative to lane lines—despite all lane assist features being turned off. In multiple instances, the vehicle has tracked erratically along lane lines or navigated slight curves without driver input. The issue occurs unpredictably but is more pronounced on rural or uneven roads and during initial driving, though it can persist on highways as well. The issue caused several near miss accidents-twice it sent my vehicle careening into oncoming traffic; another time it tried to drive me back toward a pedestrian I was driving around intentionally. Driver has to be at constant heightened attention to avoid accident. Multiple repair attempts were made, including replacement of the steering column. The condition temporarily improved but returned and worsened. During the final repair attempt, dealership foreman, master technicians, and manufacturer technical support were involved, and the condition was ultimately deemed a “characteristic” with no repair available. The vehicle remains unrepaired and unsafe to operate. The dealer is refusing to supply the customer with any details of the repair order and diagnostic work that was done. The manufacturer has agreed to repurchase the vehicle under lemon law, confirming the defect could not be resolved.

NHTSA complaint #11726936 — an unverified report by a vehicle owner.

LANE DEPARTURE: BLIND SPOT DETECTION

I have put on over 20,000 miles since I purchased new in September 2024. The entire time of ownership, I have dealt with false blind spot warnings. With a clean car/clean sensors, it doesn't matter the time of day/night... when driving at highway speeds, the right rear blind spot warning comes on intermittently even when driving in the right lane of interstate with only the shoulder of the interstate next to me and no other obstructions. When this happens while in the passing lane and believing there is nobody next to me and I put on the blinker and try to switch lanes.... it alarms me saying there is something in my blindspot. These are false readings, that make this "safety feature" a safety concern. Sometimes, the car even tries to pull me back in my current lane even though there is nothing in sight in the lane I'm trying to switch to. The I have had the car to the dealership approximately 4 times for this ongoing issue and they claim they are unable to replicate the problem. I have read numerous other complaints reporting the same issue, and Mazda has not developed a fix to date.

NHTSA complaint #11717643 — an unverified report by a vehicle owner.

LANE DEPARTURE: BLIND SPOT DETECTION

At highway speeds (>60 mph), the blind spot detection on the passenger side will alert that a car is present in the vehicles blind spot when no car is present. This will happen intermittently and will continue even if I begin the lane change process, it will continue to alert that the car is there. Additionally, and less frequently, the forward collision detection system will identify a car is in front of the vehicle causing a sudden slow down in the adaptive cruise control or an alert.

NHTSA complaint #11715451 — an unverified report by a vehicle owner.

FORWARD COLLISION AVOIDANCE: WARNINGS

At highway speeds (>60 mph), the blind spot detection on the passenger side will alert that a car is present in the vehicles blind spot when no car is present. This will happen intermittently and will continue even if I begin the lane change process, it will continue to alert that the car is there. Additionally, and less frequently, the forward collision detection system will identify a car is in front of the vehicle causing a sudden slow down in the adaptive cruise control or an alert.

NHTSA complaint #11715451 — an unverified report by a vehicle owner.

LANE DEPARTURE: BLIND SPOT DETECTION

The contact owns a 2025 Mazda CX-70. The contact stated that while driving at an undisclosed speed, the blind spot monitor beeped and lit up on the mirror. The contact stated that there was no other vehicle nearby. The vehicle was taken to the dealer; however, the failure was not duplicated. In addition, the contact stated that the failure was intermittent. The failure reoccurred. The vehicle was taken back to the dealer, where it was diagnosed with failed blind spot monitor sensors. The contact was informed that the blind spot monitor sensors needed to be replaced. The vehicle was repaired; however, failure reoccurred. The contact stated that while driving at an undisclosed speed, the blind spot monitor beeped and lit up on the mirror. The contact stated that there was no other vehicle nearby. The blind spot monitor independently activated the service brakes. The contact stated that the blind spot monitor steered the vehicle in the opposite direction. The vehicle was taken to the dealer, where it was diagnosed with a blind spot monitor issue. The contact was informed that the manufacturer was currently working on a software update to fix the failure. In addition, the contact was informed that the failure was not a safety concern. The vehicle was not repaired. The manufacturer was made aware of the failure, and a case was filed. The failure mileage was approximately 2,500.

NHTSA complaint #11713459 — an unverified report by a vehicle owner.

LANE DEPARTURE: BLIND SPOT DETECTION

Multiple times when there is a car on my left or right blind spot and I am merging into their lane the warning does not go off and has caused me to nearly collide with the cars without my intervention. The warnings only work if the cars are behind me not adjacently. This is misleading because the , i-ACTIVSENSE says its 360 degrees, but its not alerting or warning to cars to my left or right. I do not trust the safety systems.

NHTSA complaint #11706775 — an unverified report by a vehicle owner.

BACK OVER PREVENTION: REARVIEW SYSTEM BRAKING

Multiple times when there is a car on my left or right blind spot and I am merging into their lane the warning does not go off and has caused me to nearly collide with the cars without my intervention. The warnings only work if the cars are behind me not adjacently. This is misleading because the , i-ACTIVSENSE says its 360 degrees, but its not alerting or warning to cars to my left or right. I do not trust the safety systems.

NHTSA complaint #11706775 — an unverified report by a vehicle owner.

LANE DEPARTURE: BLIND SPOT DETECTION

[XXX]: While traveling eastbound and westbound on [XXX] between La Crosse, WI and La Crescent, MN, the right side BSM mirror warning illuminated several time with NO vehicles in blind spot (no video captured). [XXX]: while entering La Crescent, MN from [XXX] southbound, the right side BSM mirror warning illuminated with NO vehicle in blind spot. Video was captured on cellphone if requested, 277MB in MP4 format. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA complaint #11703531 — an unverified report by a vehicle owner.