Home · 2020 BMW 4 Series Gran · Complaints
What 3 owners told NHTSA about the 2020 BMW 4 Series 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.
1 of 3 complaints match · Brakes · clear filters
Jan 13, 2022Brakes
The contact owns a 2020 BMW 430i. The contact stated while his wife was driving below 10 MPH and depressing on the brake pedal, the vehicle failed to stop as needed. The contact stated no warning light was illuminated. The driver parked the vehicle and then had the vehicle towed to the local dealer, where it was diagnosed with needing the brake booster replaced. The vehicle was repaired. The manufacturer had been informed of the failure. The failure mileage was approximately 86,000.
NHTSA ODI 11447381
Working with the data? Download all 3 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 4 Series Gran verdict →