NHTSA Complaint #11542816 — 2015 BMW 328I

Drivetrain malfunction warning comes on when the car runs for a few hours in the heat or when randomly driving. Sometimes the warning will clear itself after waiting a few minutes, but it might come back after a few minutes driving or not. In other instances, the drivetrain will not clear itself and will take more than a few hours. Took it to the repair shop 3 times and they indicated it could be the fuel pump modular or spark plugs or it could just be that the heat is messing up the software system. The mechanic has mentioned that drivetrain malfunctions have been occurring more regularly with BMWs. The issue is that this drivetrain can malfunction at any random time. Driving on a highway, street, or just starting up the car after letting it sit for a few minutes or days. It's a safety hazard because it can happen at any time unexpectedly. When it does, the car goes into neutral and this is dangerous if driving on the highway at higher speeds and needing to pull over into right hand lane. I've not yet taken it to a dealer to look at, just a certified BMW repair shop. There have been no warning issues and the car clears whenever it is taken to the repair shop.