AI DamageBMW M850I: problems, complaints, bulletins
Summary for the BMW M850I across 7 model years: 1 owner complaints and 178 NHTSA service bulletins, plus repair videos. Pick a year for details.
Model years
What fails most often
- Engine and cooling: 1 complaints (100% of all); manufacturer bulletins for this component: 25.
Engines and transmissions
US-market versions per EPA. On the right: how many NHTSA complaints name this engine or transmission type.
- 4.4 L · petrol · turbo · 8 cyl 2020–2021
- automatic, 8-speed 2020–2021
Drive: AWD
Components owners complain about
| Component | Owner complaints | involving a crash | Technical service bulletins (TSB) |
|---|---|---|---|
| Engine and cooling | 1 | 0 | 25 |
| Equipment | 0 | 0 | 205 |
| Electrical system | 0 | 0 | 176 |
| Steering | 0 | 0 | 47 |
| Structure | 0 | 0 | 32 |
| Backover prevention | 0 | 0 | 27 |
| Engine | 0 | 0 | 25 |
| Service brakes | 0 | 0 | 25 |
| Visibility | 0 | 0 | 22 |
| Lane departure | 0 | 0 | 15 |
| Seats | 0 | 0 | 15 |
| Powertrain | 0 | 0 | 14 |
| Fuel system | 0 | 0 | 13 |
| Exterior lighting | 0 | 0 | 11 |
What owners report
Short excerpts of NHTSA complaints in the original wording. These are owner statements not verified by NHTSA; personal data removed.
There was no warning light illuminated. The vehicle was taken to a local dealer to be diagnosed, and the contact was informed that the expansion tank was faulty and needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure. The approximate failure mileage was 60,128.
What to check before buying
- Engine and cooling. Radiator and fan after a frontal hit, coolant level and condition, overheating.
- Electrical system. Scan all modules, test the battery and alternator, inspect connectors near the impact zone.
- Steering. Steering play, power assist, rack and tie rods after a wheel impact.
- Structure. Rails, pillars, panel gaps, signs of pulling or welding.
Manufacturer service bulletins
Bulletin titles as filed with NHTSA.
- The Fuel Injector Condition-Specific Repair Coverage Program applies to qualifying repairs for the…
- The Fuel Injector Condition-Specific Repair Coverage Program applies to qualifying repairs for the…
- The Fuel Injector Condition-Specific Repair Coverage Program applies to qualifying repairs for the…
- the Fuel Injector Condition-Specific Repair Coverage Program applies to qualifying repairs for the…
- Under certain driving situations, coolant leaks onto the fuel injectors on cylinder bank (5-8)
- Under certain driving situations, coolant leaks onto the fuel injectors on cylinder bank (5-8)
- The basic conditions for initializing the power windows are not met
- The Central Information Display goes black intermittently due to resets of the Head Unit (HU-H3)
- The electrical system of BMW vehicles has been subject to an ongoing development process over the last few…
- At low outside temperatures (below 40 degrees F) and slow driving speeds (i.e
- A vehicle arrives at your center to be diagnosed for a micro-leak in the fuel evaporative (EVAP)…
- Functional noises (squealing/honking) when braking shortly before the vehicle comes to a stop
Other models of this make
Read also
Sources: public NHTSA data (USA): service bulletins and owner complaints; YouTube: links to videos credited to their authors. Complaints are owner statements not verified by NHTSA, and describe defects rather than crash damage. Data updated 2026-11-04.