Mazda CX-5 lane assist problems

Filed Sep 4, 2026 · Steering · PA

Component failure: potential thermal (heat-related) breakdown of the EPS control module, steering rack electronics, or associated wiring harness. Description: After approximately two hours of continuous highway driving, a critical Red Steering Wheel Warning Light illuminates intermittently in the center dashboard. This indicates a severe system fault and imminent threat of total loss of power steering assist while operating at highway speeds presenting an extreme safety hazard. The vehicle is under the bumper-to-bumper warranty and was brought to authorized Mazda service for the warranty repair. The dealership refused to perform a deep electronic diagnostic of the EPS module. The service manager released the vehicle back to me, claiming the issue cannot be duplicated unless it is driven for two hours and no active codes are showing. He is claiming this is a lane assist issue and the vehicle is safe. This is not a lane assist issue as it was occurring for the complete two hour trip and not on a specific road area that the lane assist could not detect. By refusing to escalate a critical steering failure to manufacturer engineers, the dealership has forced me to continue driving a potentially unsafe vehicle with a known steering defect in order to “prove” the malfunction occurs.

Filed Aug 5, 2026 · Driver assistance · GA · crash

While driving in the Interstate, a truck swerved towards my lane; I swerved into the next lane to avoid the truck hitting me and when I began to swerve my Lane Departure warning malfunctioned and caused my car to completely shut down. I immediately put my hazard lights on to hopefully avoid being hit; but, a car behind plowed right into my rear end. The police were onsite at the accident. My vehicle has been inspected by an independent service center and my insurance representative.

Filed Jan 22, 2026 · Brakes, Driver assistance · NJ · crash · 1 injury

What component or system failed or malfunctioned, and is it available for inspection upon request? - Smart Brake Support (SBS) & Forward Obstruction Warning system malfunctioned. Front radar sensor malfunctioned. Parking brake malfunctioned. I-activesense system malfunctioned. Emergency lane keep disabled. Dynamic stability control malfunctioned. Traction control system not operating correctly. Anti-lock brake system (ABS) malfunctioned. Brake system not responding. How was your safety or the safety of others put at risk? In total 10 malfunctions led to brake not responding and could not stop the car and resulted into a car accident. Has the problem been reproduced or confirmed by a dealer or independent service center? NO Has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others? POLICE report from car accident states brake malfunction. Were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear? Car was totally fine until all 10 error messages appeared on Jan.17th 2026 12:42-12:43PM and immediately the brake system did not respond and resulted in the car accident. **important** Police report documented that the officer on scene is a witness of the car dashboard shows “brake malfunction”

Filed Jan 31, 2025 · 30,000 miles · NJ

The contact's daughter owns a 2019 Mazda CX-5. The contact stated that while her daughter was driving at undisclosed speeds, the Mazda Connect Center Display touch screen was operating independently, causing vehicle functions to be engaged unintendedly. The contact was concerned for her daughter's safety because the center display functions included safety lane departure warning, blind spot monitoring, and traffic sign recognition safety functions. The contact related the failure to Mazda Special Service Program (SSP) Number: B6. The dealer and the manufacturer were notified of the failure. The vehicle was not diagnosed or repaired. The failure mileage was approximately 30,000.

Filed Nov 17, 2024 · Brakes, Electrical · TN

The steering and braking systems on my vehicle malfunctioned after jumping my vehicle when the battery drained too far to start, or even power my cars baseline electrical systems. After jumping my car, I started backing out of my parking spot and when I turned the wheel it very violently jerked in a manner that could have hurt me if I'd been holding onto the wheel tighter. Around this same time I believe I recall the brakes automatically applying and halting the vehicle. I was too far out of my parking spot when this began occurring and had to try to maneuver into a different one, during this attempt both of the conditions described above reoccured several times. I eventually noticed that it only seemed to trigger when the wheel was at more extreme steering angles, by keeping the steering angle lower I was eventually able to maneuver into another spot without triggering the issues. After parking and letting the car run for a bit to recharge the battery I no longer experienced these issues. There were several warning lights related to roll stability control, lane departure monitoring before pulling out. The following warnings were present, but I'm unable to recall whether they displayed before I first hit the issues: Smart Braking Malfunction, Power Steering Malfunction, Transmission Malfunction, Check Engine Light. The vehicle has not yet been inspected by anyone, however I was able to find evidence of other people complaining about what sounds to be the same issue going back several years online. [XXX] [XXX] [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Sep 25, 2024 · NY

The infotainment system ghost touches on its own. It changes all car settings by itself. Active driving display, safety features like distance recognition, lane assist, blind spot monitoring, etc. Every setting available in the infotainment system gets changed or reset on it own. Even when you turn it off. It turns back on. GPS routes, dials people, hangs up, mutes on its own, etc. Mazda dealership says it’s out of warranty and I would have to pay out of pocket to fix it. However it is an ongoing issue where now there is a class action lawsuit.

Filed Jun 19, 2024 · UT

Mazda has a safety problem with the infotainment system in their CX-5 models 2014 - 2020 and refuses to recall or do anything about it. The infotainment system has a ghost in the machine that changes settings while driving and literally screams at you through the stereo system. The ghost turns the volume all the way up and shouts, "navigation will be at this volume" over and over again (10+ times in a row). I try turning down the volume, but the ghost continually changes the volume back to max and continues shouting. Most often, this occurs when facing the sun. The ghost also changes all sorts of system settings, some relating to safety features such as lane departure, and blind spot warnings. When this occurs, it is incredibly distracting, and many times I have had to pull off the side of the road, until the issue subsides, just to get back on the road and have the issue continue to persist. This safety issue surfaced shortly after my warranty expired. In having the vehicle serviced, I was told it was either the control knob or infotainment screen. In 2023, I opted to have the control knob replaced out of pocket as that was the less expensive option ($600+). The screen replacement was quoted at $1200+. Since that time, the issue has persisted and worsened. In doing my own research online, thousands of Mazda customers have this exact same issue in models spanning from 2014 - 2020. The ghost is attributed to the touch screen function and a faulty wire mechanism. Many consumers have taken apart their dashboards (a huge undertaking) to disconnect the touchscreen wire and resolved the ghost problem, leaving the touchscreen non-functional. I have tried contacting Mazda corporate to explain this is a major safety concern and that I am a person who has auditory/sensory sensitivities. They refuse to make this right and I refuse to spend more money to fix a known issue that spans over 7 years.

Filed Apr 29, 2024 · Driver assistance · ME

In under 36 months failure of the front sensing camera disabled parking brake, traction control, emergency braking assistant, traction control, lane keeping assistance and lane departure warning

Filed Feb 11, 2022 · Driver assistance · CA

The Adaptive Cruise Control system (collectively including the Lane Departure Warning, Forward Collision Warning, Smart city brake support etc.) on this SUV stops working abruptly and randomly while the car is in operation on the road. This is a major safety concern as it can crash into a leading vehicle in absence of adaptive cruise capabilities. The system generally resets or starts working again after a 5-10 minutes, but there is no rhyme or reason why it stopped working or when it would start again. It has happened in cloudy, harsh cold weather, and also on a bright, warm sunny day. This makes the ACC unreliable. The dealer could not reproduce the malfunction, as generally the car is stationary in the workshop or isn’t driven for a long enough time while testing.

Filed Aug 24, 2018 · Electrical · 6,000 miles · MD

On two separate occasions in the last month, during key on/startup/initialization, I will get an adaptive cruise control/aeb/lane keeping system failure. This is due to a fault in the camera module. Adaptive cruise control still works above 20 MPH indicating that the failure is in the camera module. Failure is latched for the key cycle and but will recover after a long key cycle. 1st time the failure set, it was very warm out so I believed this was due to an overheat. The second time the failure set the temperature was in a normal range so my hypothesis is wrong. No unusual situation is occurring at startup except the failure. Have not taken to the dealer yet.