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Engine
11/14/2023
I actively participate in online F90 forums, and it seems like the coolant expansion tank seems to fail for almost all owners (both pre-LCI and LCI). In many cases, it also damages critical engine components underneath the tank and results in expensive repairs. Indeed, because BMW has failed to address this problem, the afternmarket already offers an aluminum billet coolant expansion tank, as well as a coolant expansion catch can that reroutes escaping coolant so as not to damage components located beneath the tank. While interacting with other owners, I learned that these failures continue to fail (including the recently revised part number) and there are several owners that needed the tank replaced multiple times (an owner I interacted with on bimmerpost today is on tank #8). Can you please advise as to BMW’s intent to properly and permanently fix this issue? It's a major design flaw impacting all F90 M5s (ticking time bomb), and I am very surprised to see no official recall and re...
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Unknown Or Other
02/18/2022
Coolant bottles on all F90 BMW M5's have a faulty coolant bottle that BMW refuses to acknowledge. The coolant bottle cracks no matter how many times it's replaced and it leaks coolant down into the injectors causing injector and engine failure.
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Power Train
08/29/2022
car went into transmission malfunction and speed was reduced when I was going at high speed. could have caused an accident but luckily I am a good driver so accident was avoided.
