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 p
2019 BMW M5 owner complaints
8 complaints filed with NHTSA on this vehicle . Listed by category, newest first within each section.
engine 5 complaints shown
Despite following the manufacturer’s recommended maintenance schedule and having the car serviced at authorized BMW dealerships, I am facing an engine failure that BMW has quoted $44,000 to repair. BMW is only offering $4,000 towards this repair, leaving us with an overwhelming out-of-pocket expense. My insurance provider has informed me that they will not cover the cost of these repairs, placing us in a difficult financial position. Given the extensive history of issues and consistent maintenance of the vehicle, this situation is both unexpected and unacceptable. The car was even under the factory warranty when many of these issues were first reported. The vehicle has a documented history of engine-related issues, which are as follows: 1. February 25, 2023: The car exhibited a drivetrain
The contact owns a 2019 BMW M5. The contact stated that while driving at an undisclosed speed, the vehicle stalled. The check engine warning light was illuminated. The vehicle was towed. The vehicle was not diagnosed or repaired by an independent mechanic or dealer. The contact researched the failure and related the failure to an unknown recall. The contact also stated that the vehicle had been repaired prior to owning the vehicle for coolant leaking into the engine. The manufacturer was made aware of the failure and confirmed that the vehicle was not included in the unknown recall. The contact was advised to contact the NHTSA Hotline for assistance. The failure mileage was 47,859.
The coolant reservoir tank leaks causing coolant to destroy the injectors on the engine below below which later causes engine failure. Nearly every BMW M5 owner I know has this issue. My coolant tank has been replaced twice in total 30,000 miles. BMW continues to provide faulty tanks. The last replacement was less than 1200 miles ago and the new tank is already leaking.
The contact owns a 2019 BMW M5. The contact stated that the vehicle was taken to the dealer and repaired under Technical Service Bulletin Number: SIB 17 03 24. The dealer replaced the coolant expansion tank; however, the vehicle experienced a coolant leak two months later. The message "Drivetrain Malfunction" was displayed, and the coolant level was low. The vehicle was taken back to the dealer, where the coolant expansion tank, 4 spark plugs, and ignition coils were replaced; however, upon driving away from the dealer, the message "Drivetrain Malfunction" was displayed, and the vehicle went into LIMP Mode and failed to exceed 40 MPH. The vehicle was taken back to the dealer, where it was repaired a third time; however, the failure persisted. The vehicle was taken back to the dealer and wa
powertrain 2 complaints shown
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.
Engine coil and fuel injectors are bad. Injector 8 went bad, followed by 6&7. The next just went bad. Was told only so many available at dealership because of on going problems.
other 1 complaint shown
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.