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What 5 owners told NHTSA about the 2020 BMW M8 Gran

These are the actual owner complaints behind this car’s reliability verdict, filed with the federal government, unedited. They’re unverified reports, not confirmed defects: read them as leads for your pre-purchase inspection, not a diagnosis.

All (5)Crash / fire / injury (1)Speed control (2)Brakes (1)Driver assistance (1)Electrical system (1)Engine (1)Fuel system (1)Transmission & drivetrain (1)Visibility & wipers (1)

1 of 5 complaints match · Transmission & drivetrain · clear filters

Jul 14, 2025Transmission & drivetrain

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. Dealership diagnosed a failed fuel pump (10-20 psi of available pressure vs 60+ normally). They replaced it and a control module to address the problem. No parts were retained by me. Until that trip I experienced no signs of a fuel pump or power delivery issue. Vehicle had ~46k miles on it and was operating normally until that point.

NHTSA ODI 11673452

Working with the data? Download all 5 complaints as CSV · fetched from NHTSA July 19, 2026

How to use these: a complaint is one owner’s report, filed voluntarily and published unverified. Patterns matter more than any single story. If several owners describe the same failure at similar mileage, put that system at the top of your pre-purchase inspection list. Back to the full 2020 BMW M8 Gran verdict →