Automatic Transmission Control Module problems of the 2010 Mazda MAZDA3

Transmission control module issues. Car was driving on the expressway and wouldn’t shift out of second gear. Engine light and at light came on. Had to drive slowly on the expressway and get off on the closest exit. Cars were speeding past me and I had to be careful not to get hit. Research and shop shows the 2010 Mazda 3 vehicles have lots of issue with the tcm because they get hot due to there location.

The transmission control module (tcm) has gone out on my car, causing it to shift to 2nd gear while doing 75mph with cars around me, and would no longer shift out of 2nd gear, or into reverse. It was an extremely dangerous situation that made me come very close to wrecking into a car, as well as the many cars behind me that had to emergency brake due to my rapid deceleration, especially without and brake lights coming on because it was engine braking. Doing a simple google search show that this is an extremely well-known problem effecting almost every Mazda 3 that used this tcm in 2010-2011. Any mechanic will tell you it's a known problem, and that it was due to where and how Mazda placed the computer, which causes it to overheat and fail without warning. I'm not sure why there has not been a recall on this issue with how prevalent it has been, and how easily recognized it is by mechanics. It is not a cheap fix, and can cause many other major issues leading up to requiring a full new transmission, if the problem did not already cause the car to wreck!.

I had my Mazda 3 for a couple of days and I'm driving down the road and all of a sudden my car jerked so bad I thought I had hit the brakes or hot something I couldn't see. But I hadn't hit the brakes nor did I hit anything. I took it to Mazda in panama city and they told me it was my transmission control module. It forgets to shift. It's located under the battery and I'm aware that this part of car engine is supposed to breath to work right. I just know it doesn't work right and every time I drove my car it's steady jerking and snatching my wheel. I can't afford to pay for something like this and I have no other vehicle to drive. I know this is an engine problem so what can be done.

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.

I was driving and felt the car down shift on the highway, at light came on and some sort of traction control light came on. Rpm would go crazy sometimes while this happened. When I got home and put it on park it shifted really hard tried to put it on drive and shifted hard. As well so I let it be. I heard about this happening to other Mazdas as well please investigate this supposedly its a issue with the transmission control module.