2015 Mazda CX-5

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.

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.

I BOUGHT A BRAND NEW 2015 MAZDA CX-5 IT HAD LESS THAN 50 MILES ON IT. THAT WAS DECEMBER 2015. I GAVE THE CAR TO MY SON, WHO HAS BEEN DRIVING IT FOR THE LAST 2 YEARS. HE HAD THE OIL CHANGED EVERY 5000 MILES WITH THE SYNTHETIC OIL WHICH I WAS TOLD WAS THE CORRECT WAY ACCORDING TO MAZDA. ON APRIL THE 24TH 2019 THE CAR DIED ON THE HIGHWAY. MY SON SAID THE LIGHTS ON THE CONTROL PANEL FLASHED AND THE CAR STARTED SLOWING DOWN AND KILLED OVER WOULD NOT START BEFORE IT DIED MY SON SAID THE ENGINE STARTED KNOCKING REALLY LOUD. NOW THE DEALERSHIP WANTS 10,304.00 TO FIX A CAR THAT HAS A BB VALUE OF 12,000 TO 15000 DOLLARS. THEY WANT TO REPLACE THE ENGINE,FUEL INJECTORS, AND THE FUEL PUMP AND IT ALSO BLEW A FUSE THAT THE GUY WORKING ON IT SAID HE HAD NEVER SEEN HAPPEN BEFORE. NOW THAT WAS A MAZDA EMPLOYEE, NOW I HAVE RESEARCHED THIS SITE AND THIS IS NOT A UNCOMMON PROBLEM FOR MAZDA, BUT THE DEALERSHIP WON'T OWN UP TO IT. THEY JUST SAY IT IS PAST WARRANTY. I DON'T NEED THIS STRESS.

THE SERVICE DEPARTMENT PEOPLE OF KOEPPEL MAZDA IN WOODSIDE, NY WAS EVADING TO HELP ME SCHEDULE A SERVICE APPOINTMENT IN CONNECTION WITH THE RECALL. I SPENT MORE THAN 30 MINUTES ON THE PHONE ENDING WITH NOTHING BECAUSE THE PEOPLE IN THAT DEALERSHIP WERE TRANSFERRING ME BACK AND FORTH. THE NUMBERS I CALLED ARE 718-721-9100 AND 718-764-8105. THIS KIND OF CUSTOMER SERVICE IS COMPLETELY UNACCEPTABLE.