Mazda CX-5 grinding brakes problems

Filed Oct 30, 2026 · Transmission · WA

I am filing a defect complaint regarding a severe drivetrain safety hazard on my 2020 Mazda CX-5 (currently at 62,800 miles). The automatic transmission has begun slipping and hesitating during acceleration, specifically producing a high-pitched chirping/squeaking noise during the 3rd-to-4th gear upshift. This issue is fully documented by the manufacturer under Technical Service Bulletin TSB 05-005/23. Mazda's internal bulletin admits that the root cause is an inherent manufacturing defect where the torque converter lockup clutch friction material degrades prematurely, contaminating the transmission fluid with fine iron powder and causing internal clutches to slip. This transmission slippage causes unpredictable power delivery and hesitation when merging into active traffic, creating an immediate safety hazard. Mazda Corporate (Case File: 00504052) has acknowledged the defect but refuses to cover the repair in full because the vehicle is 2,800 miles past its powertrain warranty, attempting to pass thousands of dollars in repair costs for a known factory defect onto the consumer. The car has already been diagnosed by Mazda Dealership at Walkers Renton Mazda, WA. the federal safety agency needs to investigate this widespread Skyactiv transmission defect and force a mandatory safety recall. Please check TSB 05-005/23.

Filed Jul 18, 2026 · Brakes, Driver assistance · CA · 1 injury

At about 6:50am July 7th 2026, I was getting in the exit lane of interstate 50 to exit. I merge into the lane and being applying my breaks since I was going about 55-60mph. However, my vehicle did not slow down. I began to press harder, it still did not slow down, so I pressed as hard as I could because I was rapidly approaching stopped vehicles. The vehicle began to make a grinding sound, it started shaking, and then a "break" light appeared on the instrument panel. After this it came to a sudden and violent stop. I have taken it to the dealership for similar issues many times since I got the vehicle in October 2025. Each time they state that they cannot replicate the issue and the vehicle operates as it should. It is under warranty so I have not taken anywhere other than the Mazda dealership.

Filed Apr 20, 2026 · Lights · NC

Both LED headlights died within two months of each other on this relatively new vehicle. Outside the three year warranty, but only 27,000 miles (well within the 36,000 warranty period). As it's outside of the three years, the warranty already expired regardless of mileage. One headlight was grinding (fan) while the other's low beam simply died. Each headlight cost $2800 to replace. You can't simply replace a burned out bulb with this headlight design. The entire unit must be replaced at a cost of almost $3000 depending on your dealer. This is a major safety issue when headlights die while driving at night. This is not a user maintenance issue. It is not normal wear and tear. Almost $6000 dollars to replace poorly designed headlights within two months of each other on a new-ish vehicle while being a safety concern constitutes reason enough to issue a recall, and to reimburse owners for previous replacements.

Filed Apr 19, 2026 · Brakes, Driver assistance · CA · 1 injury

While driving at various speeds, including highway speeds, the vehicle intermittently fails to slow down when the brake pedal is applied. On multiple occasions, the brake pedal was pressed but the vehicle did not respond appropriately and continued moving forward. On December 1, 2025, while traveling at approximately 65 mph on the interstate in rainy conditions, the vehicle began making a grinding sound and started sliding instead of slowing down. The vehicle briefly lost the ability to decelerate, creating a near-collision with a semi-truck. On December 22, 2025, the issue occurred twice in one day. While attempting to brake at a stop sign and in traffic, the vehicle did not slow down, nearly causing collisions with vehicles in front and adjacent lanes. In the instance where approaching the stop sign where a vehicle was stopped, the dashboard flashed “break” while I was breaking as hard as I could. Warning lights and sensor-related alerts have appeared intermittently prior to and during some incidents. The issue has continued intermittently, including additional incidents where the brakes were either unresponsive or overly sensitive. They do not respond in a consistent or predictable manner, making safe driving nearly impossible. This problem places myself and others at significant risk of collision due to loss of braking control. The vehicle has been taken to multiple dealerships for inspection. The problem has not been successfully replicated, and no repairs have been performed to resolve the issue. Dealership documentation includes customer reports of “NOT BRAKING” and brake malfunction concerns.

Filed Apr 10, 2026 · Lights · MA

My 2023 Mazda CX-5 (48,000 miles) is experiencing a loud mechanical whirring/grinding from the driver-side headlight assembly, a documented manufacturing defect involving foreign matter contamination of the internal LED cooling fan bearings (TSB 09-029/25). Despite the manufacturer acknowledging this factory-installed defect, Mazda has refused to proactively remedy the issue because the vehicle is nominally past its 36,000-mile bumper-to-bumper period. I have been explicitly advised by service personnel to continue operating the vehicle until the headlight unit 'entirely fails' before further assistance may be considered. This 'fail-first' directive is a reckless disregard for public safety; the internal cooling fan exists specifically to prevent the high-intensity LED from overheating. A failure of this fan leads directly to the sudden burnout of the main headlamp while the vehicle is in motion. Mazda is essentially requiring me to drive a vehicle with a known, ticking-clock lighting defect and wait for a total loss of visibility at night before they will address a part that was contaminated during their own production process. This is a critical safety hazard that places myself and other drivers at risk of a collision due to sudden headlamp failure.

Filed Jan 16, 2026 · Lights · PA

Drivers side LED headlight cooling fan is making a loud buzzing noise 100% of the time when the headlight is turned on which indicates that the fan is failing. If fan fails, it will lead to overheating and failure of the headlight. Vehicle was inspected by Mazda to confirm the issue. Mazda issues Service Alert SA-013/23 and Technical Service Bulletin 09-015/23 have been issued for this problem. TSB states: Some customers may notice an abnormal noise (i.e. whine, groan, rattle or squeak) coming from the front combination lights when turning them on, or a few minutes after turning them off. The noise may be due to contamination by foreign matter during the manufacturing process. The fan motor bearing may become worn out during use. To eliminate the noise, the production process at the supplier and the material has been modified.

Filed Jan 31, 2024 · Brakes · NY

At 15k mi the rear left wheel started to squeal. Took car to dealer, they claimed all brake pads on the car worn out and replaced all of them (front+back), paperwork is available. That's an indication of a design defect impacting the brake system, this is not acceptable. Next week I was driving in winter storm and at one point the car started shifting to the left. I managed to regain control, dashcam video is available. I used to have a 2016 CX-5 and it experienced exactly the same issue. At one point dealer wanted to change brake pads after just 6k mi, I replaced them myself and noticed that the pads were worn unevenly, but it was easier to get rid of the car back then. The number of reports similar to mine is overwhelming, it is sad to see the federal safety agency not taking any action on this life threatening ticking time bomb.

Filed Aug 7, 2023 · Brakes · ME

My car only has 32000 miles on it and I was told that I need new brakes and calipers. My car is making grinding and creaking noises when I back up, stop or get into it. Because of these brake issues it feels like the car is taking longer to stop. I have never had a car that needed this extensive of a brake job at 32000 miles. This seems excessive.

Filed Apr 24, 2023 · Engine, Fuel system · MO

While driving on the interstate (continuously for about 4 hours) the vehicle suddenly lost power and the engine stalled. Power steering and power brakes were impacted and the vehicle was difficult to get off the road safely. Once stopped, it would not restart over a 30 minute period. A tow truck was called and it was taken to the dealer. A couple hours later when the dealer checked it, the vehicle started normally and drove without issue. A P0192 code was stored in the ECU so the high pressure fuel pump was replaced even though they could not reproduce the problem. The vehicle has 63000 miles on it now, but a similar sequence happened at 15000 miles. In that situation while driving at a steady speed all power cut out and the engine abruptly downshifted to the point where the tires squealed. After pulling off the road and stopping/starting the vehicle it seemed to drive normally again. We were traveling at the time with no dealer nearby, but when we returned back home we took it to the dealer and they found the same code P0192 and ran various tests and decided to replace the high pressure fuel pump even though it was driving properly. In only 63000 miles this vehicle has twice failed dramatically and without warning in ways that could easily cause an accident or injury. I am lacking in confidence that the root cause has ever been identified.

Filed Jan 26, 2023 · PA

4 month old car and brakes are rusted and rotor is warped. The car is shaky and rear right side grinder. Mechanic said it was safe to drive and that it was a “user error” for being to hard on the brakes. They said they inspected the vehicle and could not determine the “brown liquid” was. They cleaned what I assume was rust and claimed it was safe to drive again. Two weeks and three drives later it is grinding again, smelling smoky, and shaking. I feel unsafe driving the car. There were no warnings or messages when the symptoms first appeared. The car is available for inspection upon request. Although it has not directly put anyone at risk yet, I believe it is a matter of time before myself or someone else gets injured.