1991 Pontiac Sunbird Engine cooling Problems
- Complaints
- 6about this part
- Share
- 22%of 27 total for the year
- Median mileage
- —not reported
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 6 complaints about the engine cooling of the 1991 Pontiac Sunbird, 22% of the 27 complaints for this model year. 1 a fire, according to the filers.
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.
“When my cooling system was not working I brought my car back to the dealer that I bought the car from and when they replaced the fan motor they purposly put an extra washer on one side causing the fan to hit the radiator which then caused my head gasket to blow. I contacted the dealer again and was told that this was not their problem!! I then took my car to a shop in millax and had a different used engine placed in it now, this engine has no acceleration due to a bad cam shaft, so I again have to have my car repaired.”
NHTSA complaint #700722, filed 1998-11“Consumer experienced complete failure of engine cooling system,causing the vehcile to shutdown which could have resulted in an accident.the vehicle has been at the dealer 3 times, and almost the entire cooling system parts have been replaced, but defect is still occurring.”
NHTSA complaint #836532, filed 1999-04“Engine head gasket cracked, causing the oil and the coolant to mix together and leak, may have caused fire or engine damages. Common problem. Please provide further information and VIN#.”
NHTSA complaint #834661, filed 1999-02Related service bulletins
- 10246631Sep 1, 2013Expanded Availability for Remanufacture and Return (R&R) Electronic Control Modules
Engine cooling: other model years
Other parts of the 1991 Pontiac Sunbird
5 complaintsSeat belts
4 complaintsBrakes
3 complaintsElectrical system
3 complaintsLatches, locks and linkages
3 complaintsOther or unknown
1 complaintsSteering
1 complaintsTires
1 complaintsTransmission and drivetrain
1 complaints
← All problems reported for the 1991 Pontiac Sunbird
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 29, 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