2010 Mazda MAZDA3: sudden unintended acceleration

Filed Jun 17, 2021 · NY

I have been experiencing unintended acceleration while in D (drive) but stopped with my foot on the brake. For instance, when fully stopped at a light, the car will suddenly experience a small burst of acceleration and propel forward. I see the engine rpm go up when this occurs even though I am stopped. This is very scary and uncomfortable as I feel like I lose control of the car during those times and can potentially hit another car or person in front of me.

Filed Feb 28, 2019 · Acceleration, Transmission · 63,000 miles · MI

10+ incidents of sudden unintended acceleration since aug 2018. Always at freeway speed of traffic, I.e. 70-75mph. Occurs when intentionally decelerating (easing off the gas pedal and initiating braking). Rpms jump to 7 or 8. Acceleration immediately drops and steads after tapping/applying pressure to brakes. Has been taken ralph thayer dealership 3 times -- aug2018, jan2019, feb2019. Each time vehicle kept for a week but unable to duplicate issue. Data recorder was installed in jan2019. Despite a several minute long episode on feb 22, 2019 in which the car behaved erratically (buckling and jolting) and wouldn't accelerate more than 60 MPH while the rpms were high (4-5) for several minutes, this was somehow not sensed by the data recorder. My own guess is an issue with the PCM or the automatic transmission control module. Have suas affected transmission? Seems to be a known issue yet the dealer/mazda reaction is perfunctory at best. No commitment to resolve. E.g. Because my driving was limited while the recorder was in, I requested that it be left in for 3 months. Mazda refused, stating that if it happens again (and it will), they'll reinstall the recorder. That a collision hasn't happened is just luck. A serious accident caused by this vehicle is imminent since these issues adversely affect the ability to control the vehicle. I also don't relish being my own crash test dummy. There is nothing they can do beyond a series of expensive parts replacements based on their guesses? I have some video and photos per their request, but note that attempting to photograph or video the dashboard while driving is an extra bullet in what already feels like russian roulette. I've attached a summary of events provided to mazda in january and the most recent mechanic's report. $800 suggested for guess-based TCM replacement, $240 inconclusive tests, no loaner provided.

Filed Oct 19, 2015 · Acceleration · 120,000 miles · MA

Gas pedals is sticky when flooring it. It will stay at the maximum acceleration position forever or the gas pedals is stick with the floor forever. The only way to get out of it is to manually pull it back. The sticky gas pedals will lead to unintended acceleration incidents. I believed this is a common issue with year 2010 mazda3 5 door.

Filed Mar 1, 2015 · Acceleration, Engine · 32,000 miles · OR

Drove 80 miles to destination on freeway using cruise control. Car accelerated above cruise setting on downhill - did not engine brake to hold speed. When pulling into destination hotel parking spot and with right foot on brake, engine revved dramatically. Applied both feet to break. Automatic transmission. Changed gears to n, r & p, but engine continued to rev. Turned engine off. Smoke generated from engine entered cabin. Did not use car until next day. Returning home next day used cruise control and exited freeway for break. Slowing down for stop light with car ahead and foot on brake when engine revved again as before. Shifted car into neutral and turned off car then back on. Drove car to dealer on way home without another incident. This dealer is where we purchased the care and all work except tires/alignment and battery occurred. They examined and inspected the car and kept it for the next 10 days logging 200 miles without a recurrence of the unintended acceleration.

Filed May 6, 2011 · Acceleration · 600 miles · NH

Tl*the contact owns a 2010 mazda3. The contact stated that while the vehicle was idle, it would lunge forward and the rpms would increase. The failure occurred intermittently. The contact was forced to push the shut off button to stop the vehicle from moving forward. The vehicle was taken to an authorized dealer who could not duplicate the failure. The vehicle was not repaired. The manufacturer had not been notified. The VIN was unavailable. The current mileage was approximately 14,000. The failure mileage was 600.

Filed May 2, 2010 · Acceleration, Fuel system · 1,260 miles · VA · crash · 1 injury

While driving slowly through a community center parking lot, the automobile suddenly accelerated and did not respond to braking,resulting in a crash into a brick wall.