Problems · NHTSA complaints
2021 BMW M4 problems
Owners filed 1 complaint about the 2021 BMW M4 with NHTSA between Jun 2024 and Jun 2024. The most-cited component is service brakes (1).
Complaints
1
Filed with NHTSA
Crashes
0
Reported by owners
Fires
0
Reported by owners
Injuries
0
People reported injured
Deaths
0
Reported to NHTSA
Complaints by component
One complaint can cite several components
- Service brakes1
Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.
Data from NHTSA Complaints API · synced Nov 9, 2026NHTSA vehicle page
Top problems in owners’ words
Verbatim from NHTSA complaints, newest first
Service brakes
1 report
“Vehicle brake very very loudly. BMw claims this is normal, this is not true. Vehicle has extremely low miles and performs bad when braking.”
Data from NHTSA Complaints API (owner reports, unverified) · synced Nov 9, 2026
Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.