As mentioned by multiple users on the forum, it seems like there is a serious quality issue with these BMWs. I have a 220i Gran Tourer from 2016 with just over 110,000kms on it. Albeit a little more on the miles, I have followed BMW's exact guide on when to do maintenance (Oil change etc) and done most of the services with my local BMW dealership. However, the same issue with the AISIN 8 Speed Gearbox also occurred in my car. Out of nowhere the car started to drive in limp mode and all the gear shifts were messed up. It was so severe to a point where I was driving up a gentle slope of a parking garage and the car was unable to climb and rolled back until I slammed on the brakes. It nearly caused an accident as there were people walking near the slope when the car rolled back uncontrollably. Basically, the car is undrivable at this point as it can't even drive up a gentle slope without rolling back multiple times.
I had it checked with a 3rd party mechanic and its the same issue with the gearbox valve body control module that failed. An estimated cost to replace the entire gearbox assembly would cost over 10000 pounds! That's basically what the car is worth at the moment! Now I know that some might say a car with 110,000 kms is gonna have issues. Now I entirely agree on this point but a gearbox is basically one of the most crucial part of the car which in theory should't fail and need a complete replacement at just 7 years. That's just absurd in my opinion and it really speaks about the quality issues that BMWs have. Surely, a responsible user who followed BMW's exact guide on maintenance should have a car that is running perfectly fine at just 7 years. The thing that concerns me is the gearbox failed out of nowhere without warning which is a huge safety concern as I drive mostly around hilly areas, and I can't afford to have my car suddenly start rolling backwards and cause an accident!
If this issue with the gearbox was an isolated case, I would treat it as an unfortunate incident, but it does seem like its some sort of manufacturing defect or quality issue. I've read on another forum posted a few years back where 12-15 ppl also had the same issue with this exact AISIN gearbox. Their cars had a mileage ranging from 30K to 110K kms. They ended up sending a group exec complaint email to BMW AG citing each individual car's VIN number. What ended up happening is that each of the owners got a call from their respective local dealership whom offered to replace all their gearboxes completely for free. Corresponding to @
PAS593's comment on drafting an exec level complaint email, I was wondering if you all would like to send a group email to BMW AG with all the infos about our cars and see what the HQ decides to do? I've contacted my local dealership and they also wouldn't budge, that's why I feel like if multiple people send an email citing the same issues with the gearbox, it could make the issue seem more like a manufacturing defect rather than an isolated case.