MAZDA Complaints

I am reporting an ongoing defect with the infotainment system in my 2020 Mazda CX-5, involving ghost-touch inputs, system freezing, and random reboots. These issues began around the second year of ownership and have progressively worsened. The system constantly registers inputs that are not being made (ghost-touch), changes settings on its own; and occasionally- reboots while operating the vehicle. This makes it difficult or impossible to reliably use essential vehicle functions such as navigation, communication, and audio controls. The issue is particularly concerning because it creates a driver distraction and potential safety risk, as the system behaves unpredictably and requires attention while driving to manage or disable unintended inputs. I reported these issues multiple times to an authorized Mazda dealership while the vehicle was still under warranty. However, I was told no issue could be found or that software updates would resolve the problem. These updates did not fix the issue. On August 9, 2025, another system update was performed under the Mazda Connect Class Action Settlement, but the problem persists. The dealership is now requiring a paid diagnostic fee before proceeding further, despite the known nature of this defect. Based on my research and widespread owner reports, this issue is commonly associated with infotainment system defects, including screen delamination and/or failure of the Connectivity Master Unit (CMU). I am submitting this complaint to document the defect and request further review, as it affects safe operation and driver attention.

System Failure: The Power Train (6-speed Automatic Transmission) suffered a major malfunction, documented by diagnostic codes P0731 (Gear 1 Incorrect Ratio) and P0780 (Shift Error). The vehicle is available for inspection. Safety Risk: The failure caused a sudden loss of propulsion while attempting to accelerate. This created an immediate risk of a rear-end collision and left the vehicle unresponsive in the path of oncoming traffic. The transmission's unpredictable shifting makes the vehicle unsafe to operate. Confirmation: The failure and the P0731 code were officially confirmed by Castle Mazda on March 2, 2026. The manufacturer (Mazda) has been notified but has denied a remedy, despite TSB MC-10160555-0001 addressing this specific internal defect. Warning Symptoms: There was no Check Engine Light or dashboard warning prior to or during the failure. The only warning was an extreme, abnormal mechanical grinding/clunking noise from the transmission. The lack of a malfunction indicator light (MIL) meant I had no electronic warning of a looming mechanical failure while in motion.

Steering feels sticky at higher speeds, once the vehicle is at full operating temp. The steering requires some pressure to “break free” from whatever position it is in. If I’m continually moving the wheel, it steers normally. However, if I’m driving straight and need to initiate a turn or make minor steering corrections (like on the highway), I have to turn the wheel harder than normal, then it gives way and turns with regular force. This makes it difficult to control, causing the car the jerk around a lot. This is an issue many others have noticed on online forums, and there does not seem to be a known fix for this. The Mazda dealership near me could not duplicate the issue (since it takes 20-30 minutes of continuous driving for this steering issue to get worse to the point of concern), and therefore refused to look any further. This makes it unsafe to drive longer than 20-30 minutes. I am currently awaiting an appointment with an independent service center. There are no warning lamps, messages, or other symptoms that I'm aware of

Vehicle was taken to an authorized Mazda dealership for 60,000-mile service; coolant system drained and refilled. Immediately after service, check engine light illuminated (P011A – engine coolant temperature sensor correlation issue). Dealership retained vehicle, drove ~300 miles, performed a second coolant flush; issue persisted. Dealer determined heater core clogged, attributed to coolant contamination/corrosion introduced during service. Another CX-5 at the same dealership experienced the same issue. Safety Concerns: Heater and coolant system failure may affect cabin comfort and engine temperature monitoring. Occurred immediately after authorized service, suggesting procedural or system-related defect. Noted in Mazda Technical Service Bulletin 07-007/19 as a known issue. Attempts at Resolution: Mazda offered partial goodwill assistance (~$775–$875) and assigned partial responsibility to the customer. Multiple attempts to escalate with Mazda Customer Experience (Case manager Betty) have not resulted in a satisfactory resolution. Dublin Mazda dealership service department, Mr. Frank Gozales (866-502-9912) mentioned original coolant by Mazda has caused this issue on 2016, and 2017 Mazda CX5 and is Mazda problem. I am requesting NHTSA review of this issue for potential defect or safety investigation.

The contact owns a 2022 Mazda CX-9. The contact stated that the vehicle was being operated with the front driver's side seat warmer activated to the highest heat level. After driving for several hours, the vehicle was parked. While exiting the vehicle, the contact experienced pain in the rear thigh area of each leg. Upon inspect the contact discovered that the rear thigh area of both legs had sustained burning and blistering despite having pants on as a barrier during the failure. During the injuries, the contact was wearing pants. The contact was later treated at the local urgent care center for first-degree burns and blistering caused by excessive heat from the seat warmer. The manufacturer was notified of the injuries and advised to have the vehicle examined by the local dealer. The vehicle was taken to the local dealer, who was unable to detect a failure in the operation of the seat warmer, and no problem was found. The contact inquired about the temperature of the seat warmer and what its highest temperature level is; however, that information was not provided, and the manufacturer stated that it is the temperature at which the occupant felt comforable with. No further information was available. The failure mileage was 53,000.

Vehicle was dormant overnight and caught fire. Battery disintegrated and fire tore across the entire engine compartment and front end. Fire department conducted investigation and determined mechanical failure. Showed no signs of issue before hand was driven shortly the night before to move parking spots.

I was pulling into a parking spot and the emergency braking system applied the brakes very forcefully as if a collision was imminent. I backed up and saw nothing in the parking spot and then proceeded to pull back into the same spot with no issue. There was a loud and rhythmic thumping sound that I perceived as the abs system engaging. This is a rental car so I am returning it to the company, National rental car, and swapping out for a new vehicle. I contacted Mazda about this and was given a case # 00434431.

My 2018 Mazda CX-5 with 81,000 miles and an up to date maintenance record started leaking oil after an oil change. It started to notice smoke coming from under the hood and a puddle of oil in my garage floor. I took it to the shop where they determined it was a cracked cylinder head. I purchased this vehicle new from the dealership, and I have taken really good care of it. They need to issue a recall because it is a very expensive repair. Shame on you Mazda!!

Incident 1: While driving my 2024 Mazda CX-90 PHEV at low-to-moderate speed, the vehicle suddenly and completely locked up without any driver input. There was no gradual slowing or normal braking behavior. Instead, the vehicle went immediately from moving to an abrupt, forceful stop, as if maximum braking was applied instantly. There were no warning lights, alerts, or audible signals before or during the event, and there were no obstacles or vehicles in front of me. Incident 2 (approximately 6 months later): A second, nearly identical event occurred while I was accelerating or cruising. The vehicle again immediately locked up and came to a sudden stop with no warning and no driver input. There was no progressive braking or deceleration. The stop was instantaneous and extremely forceful, causing me to lurch forward into the steering wheel. There were no hazards or objects present that would justify emergency braking. Additional Details: Both events involved an immediate, full-force stop with no transition or gradual braking. There were no dashboard alerts, warning sounds, or messages during either incident. The behavior did not match any known system alerts (such as door open or limp mode). The dealership was unable to reproduce the issue and found no diagnostic trouble codes. This creates a serious safety risk, especially the risk of being rear-ended during normal driving.

Continuously experiencing sticky steering when making turns and curves/bends on the road. Have to use a lot more force to get the steering wheel back to the initial position or a safe position.