BMW M850i xDrive

The rear driveshaft Guibo (flex disc) was found cracked with nylon cords coming out during an unrelated service visit on October 1, 2026. The car was in for a window regulator repair; the Guibo was discovered on the lift. There were no prior warning lights or symptoms reported. The same part had been replaced by an authorized BMW dealer in April 2024 at 44,537 miles. The vehicle now has 105,764 miles. The dealer recommended replacement. An independent mechanic, who has not inspected the…

Fuel pump failed within a minute of initial warning and performance indicating a problem. While driving ~60 mph on the highway, available power dropped to zero within a couple tenths of a mile, *barely* allowing me to move to the shoulder. Screen error/fault indicated vehicle was ok to keep driving but to schedule service soon. Car restarted an ran for another tenth or two of a mile so I was able to move out of the dangerous shoulder off-ramp location to a slightly better shoulder location.…

The contact owns a 2019 BMW M850I. The contact stated that upon starting the vehicle, there was an abnormal coolant odor inside the cabin of the vehicle. There was no warning light illuminated. The vehicle was taken to a local dealer to be diagnosed, and the contact was informed that the expansion tank was faulty and needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure. The approximate failure mileage was 60,128.

The contact owns a 2019 BMW M850I. The contact stated that gear shifter became stuck in gear. There were no warning lights illuminated. The local dealer was not contacted. The vehicle was not diagnosed or repaired. The manufacturer was contacted but no assistance was provided. The failure mileage was approximately 40,000.

The Coolant tank is known to have and cause leakage by possible high temperatures and over-expansion. When this happens the coolant leaks all over critical engine components such as fuel injectors causing a short and risk of fire. Leaking coolant can also cause many other safety problems such as slippery brakes and/or tires. Fortunately, this hasn't happened to my vehicle yet. I have spoken with several owners who have had this issue happen to them. It would be worth investigating to see if a…

The software update was transferred from phone to the car. But would not install on the car. The issue has been raised by multiple people on various BMW forums. The clutch appears to be from BMW servers and service locations instead of dealing with root cause are trying to charge customers 350 -450 dollar to manually load gbs software. As a purchaser of the vehicle with automated software updates it is unreasonable to charge for manual update where a over the air software should work Please…

Behind the cupholder the shifting unit is unsealed and liquids spill are causing shifting issues to the shifting control module. Also the Airbag sensor is under the same gap which can cause airbag malfunction. There are numerous reports on forums with all model types 2019+, not limited to the 8 series. This is a design flaw on the new center console shifting seal. This is is a life threatening defect, already a open recall for the wire routing under the shifter for the 8 series, same area.

2019 M850i XDrive. Consumer writes regarding unintended acceleration of vehicle. THE CONSUMER STATED WHILE ATTEMPTING TO PARK, THE VEHICLE SURGED OVER A RETAINING WALL INTO THE SECOND FLOOR OF A BUILDING. SMOKE EMITTED FROM THE VEHICLE. THE CONSUMER STATED THE AIRBAG DID NOT DEPLOY.

BATTERY INSUFFICIENT CHARGE TO INITIATE REMOTE START. THE CAR AND BATTERY ARE NEW. ON THE DATE OF AUTO PURCHASE THEY NOTED THAT THE BATTERY HAD TO BE REPLACED WHICH THEY DID AT NO COST BUT NOW IT IS NOT RETAINING CHARGE IN COLD WEATHER IN MINNESOTA.

ON OR ABOUT DEC. 3, WHILE DRIVING THROUGH JAMESTOWN, NC , NO VEHICLES IN CLOSE PROXIMITY AND WITH MY WIFE'S FOOT ON THE ACCELERATOR THE CAR SUDDENLY STOPPED. ONLY TIME IT HAPPENED. ON JAN. 14, 2021, WHILE PARKING THE AUTO AND WITH MY WIFE'S FOOT COVERING THE BRAKE PEDDLE, THE CAR SUDDENDLY ACCERATED INTO A BUILDING. AIR BAGS NEVER DEPLOYED AND WITH HER FEET ON THE BRAKE PEDAL THE CAR NEVER SHUT OFF. IT JUST KEPT ACCELERATING INTO BUILDING. IT LOOKED LIKE IT WAS ON FIRE. BMW SENT A CORPORATE…