2015 Mazda CX-5

With a heavy downpour of rain the bsm flashes off, then after sitting for a few hours the car battery dies and the key fob is not recognized in the vehicle. Took it to a dealership and it stopped doing it. Code that are thrown have to do with some computer communication failing. I have had the car die on me 4 times in the last year that I’ve had it.

I was near a red light and applied the brakes, but the car accelerated and ran into the truck stopped in front of me. This happened around May of 2024. I took the car to the Elk Grove Mazda dealer. They ran diagnostic and road tests but found nothing wrong. The car had the same problem again sometime later inside my garage. The car rammed into the drywall while I tried to stop by pressing the brake pedal. I took the car to the AAA repair shop in August 2024. They spent three days, and they told me they found a problem with the "steering angle sensor." It was 22 degrees off calibration. They reset the sensor, and the car ran better. However, the car acted again after some driving. It tries to accelerate while I apply the brake pedal near a stop. I took the car back to the AAA shop, but they did not find any problems in a whole week. I still drive this(my only) car, but extra careful, keeping a longer distance between cars in front of me and braking ahead few times ahead of any stop.

While driving on the freeway the check engine light came on. I was able to drive the car home the remaining 20 minutes but there was some noticeable difficulty accelerating. When I went to turn on the car later that day the engine would not turn over and there was an audible rattling/chugging sound and the car itself shook. I was unable to get the car to start and the check engine light remained on. I had AAA check the battery the next day and confirm it was not a battery issue and a diagnostic revealed the P0192 code. AAA towed it to their shop where it was confirmed by the manager mechanic that the issue was with the high pressure fuel pump and that it was causing an issue with the low pressure fuel sensor as well. The mechanic was unable to determine what caused the pump to fail and has quoted me nearly $2000 to fix it. After some searching online it has become clear that this is an issue many other Mazda owners have faced and that is even a recall for the pump for years and makes from Mazda due to a known issue with DENSO fuel pumps causing this exact issue. Despite this being known and DENSO having admitted issue with fuel pumps in cars dating back to 2013, Mazda has not recalled the vast majority of the cars that could be affected. From information I've gathered, it is entirely possible that my vehicle could have just stopped running in the middle of the freeway due to this issue which obviously would have put me in great danger of an accident. To summarize: Low pressure fuel sensor and high pressure fuel pump with error code P0192 are cited as the issues. It's possible this issue can cause the car to stop running with no warning, which would be extremely dangerous especially on the freeway. The problem has been reproduced and confirmed by a AAA mechanic shop. The vehicle has been inspected by the AAA mechanic but no others. The check engine light came on but was not clear how extreme the circumstance was.

The contact owns a 2015 Mazda CX-5. The contact stated that while pressing the brake pedal the engine had experienced very high revving and the vehicle would lurch forward. The vehicle was taken to the local dealer who performed a PCM and TCM program update and reset the KAM per the manufacturers TSB. The contact indicated that the failure was corrected for a while but recently the failure had reoccurred. The local dealer was contacted and a service appointment was scheduled. No further information was available. The manufacturer was not yet notified of the failures. The failure mileage was 25,000.

The contact owns a 2015 Mazda CX-5. The contact stated the tires deflating abnormally. The contact stated that the tires needed to be inflated on a weekly basis. The contact took the vehicle to the dealer to be diagnosed. The contact was informed that the rims were improperly fitted to suit multiple tires, causing the tires to deflate. The vehicle had not been repaired. The tires had been replaced by several other brand tires however, the failure persisted. The dealer confirmed that the failure was not a tire failure. The manufacturer was not made aware of the failure. The approximate failure mileage was 110,000.

Occasionally have sudden unintended acceleration. Went to dealer, no codes shown. Replaced battery and did throttle service. Happens 1 or 2 times a month generally within first 5 minutes of trip when attempting to stop. While braking , rpm's go to 3k and brakes barely hold car stopped, so I throw it in neutral to stop...rpms eventually go down to normal. It's obviously a very dangerous situation. Im going to make another appt with dealer again but not optimistic because no codes show and they will keep the car until it happens but that could take forever. Went to other mechanics for fresh eyes and opinions. Some feel that it could be a software issue controlling the throttle body and said thats an engineering thing and that no technician will be able to figure that out. I had gone on Reddit / Mazda CX5 and found one other person with what looked like the exact same issue.