1991 BMW 850I Engine cooling Problems
- Complaints
- 1about this part
- Share
- 11%of 9 total for the year
- Median mileage
- —not reported
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 1 complaints about the engine cooling of the 1991 BMW 850I, 11% of the 9 complaints for this model year. 1 recall campaign on record is filed under a similar system.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“This car loses coolant, overheats, and blows a head gasket, and now possibly needs new cylinder heads. Bmw mechanic states that the temperatute gauge is not supposed to tell you the engine is overheating if the coolant has already completely leaked out of the system. That the gauge does not register the empty air in a now empty coolant system. In my opinion the temp guage should tell me the possibility of my car overheating so that I can shut down the engine and have it repaired. This has occurred twice($5,000 first time) and now an estimated $9,000-15,000 depending on extent of damage. …”
NHTSA complaint #718518, filed 2000-02Related recalls
- 98V178000Aug 4, 1998Vehicle description: passenger vehicles. A malfunction or failure of a coolant system component, such as a thermostat, water pump, or fan belt, can result in…Covers: BMW 850I 1991–1995, 735I 1988–1995, 735ILA 1988–1995 +28 more
Engine cooling: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 1991 | 1 | 11% |
Other parts of the 1991 BMW 850I
← All problems reported for the 1991 BMW 850I
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 30, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology