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2021 BMW X4 M
Limited data: few reports on file, read the verdict loosely
Too few owner complaints are on file to affirm this car. Treat it as unproven, not endorsed, and lean hard on a professional pre-purchase inspection.
6 owner complaints · 0 recalls · data verified July 14, 2026 · source: NHTSA
What the record shows so far
Only 6 owner complaints on file for this exact model year, too few to judge long-term reliability. Treat this as unproven, not endorsed, and lean on a professional inspection.
The math, shown
Full methodology →How it crashes
NHTSA’s own crash tests, separate from the reliability score above.
NHTSA crash-tested this model year but didn’t publish an overall star rating for it.
Source: nhtsa.gov/ratings. Star ratings compare vehicles within the same class and size, not across every car on the road.
The road ahead
What breaks on a 2021 BMW X4 M, plotted where owners report it happening.
Engine
33%2 complaints · 2 in the last 2 years
“The contact owns a 2021 BMW X4. The contact received notification of NHTSA Campaign Number: 25V636000 (Electrical System). While the vehicle was in park(P), there were…”
Seat belts
33%2 complaints · 2 in the last 2 years
“BOTH rear seat belts have broken off in the same spot. Went to use the driver's side rear seat belt and found it had been broken (frayed off). Moved to the passenger s…”
Transmission & drivetrain
17%1 complaints · 1 in the last 2 years
“I am reporting a safety concern regarding BMW vehicles equipped with the B58 Technical Update (B58TU) engine, commonly found on models from 2019 to 2021. The oil pump …”
Suspension
17%1 complaints
“What component or system failed or malfunctioned, and is it available for inspection upon request? - Suspension How was your safety or the safety of others put at risk…”
Recalls (0)
No recall campaigns on file for this model year.
Before you hand over money
Check the VIN for open recalls
NHTSA’s free lookup shows whether this exact car had its recall remedies completed.
Free NHTSA VIN check ↗Get a pre-purchase inspection
A $150 to $250 independent inspection of this exact 2021 BMW X4 M beats every score on the internet, including ours.
What to ask forNot set on the 2021? See how every X4 M model year scores →
Cross-shopping? Compare the 2021 BMW X4 M against another car →
What owners say
Real owners of this exact model-year, shown separately from the NHTSA score. If they disagree, that’s worth knowing.