Home · 2020 BMW 8 Series Convertible · Complaints

What 4 owners told NHTSA about the 2020 BMW 8 Series Convertible

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 (4)Brakes (1)Electrical system (1)Engine (1)Steering (1)

1 of 4 complaints match · Electrical system · clear filters

Aug 21, 2024Electrical systemEngine

My vehicle mileage was about 50,000 miles and well maintained by BMW dealership in my area. I was driving to work when suddenly my vehicle alerted me to a fault on display panel showing a power supply fault. The message said i should stop driving and call roadside assistance. The vehicle was towed to BMW dealership. There were no prior warnings or messages or symptoms in relations to this fault. The dealership confirmed that the water pump failed, and caused the drive belt to dislodge, also caused the alternator to malfunction and eventually damaged the battery. The sudden and unexplainable water pump failure caused a chain of damages that cost me thousands of dollars and posing safety risk for me and my family.

NHTSA ODI 11609934

Working with the data? Download all 4 complaints as CSV · fetched from NHTSA July 18, 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 8 Series Convertible verdict →