1991 Pontiac Bonneville Engine cooling Problems
- Complaints
- 3about this part
- Share
- 14%of 22 total for the year
- Median mileage
- 38,000miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 3 complaints about the engine cooling of the 1991 Pontiac Bonneville, 14% of the 22 complaints for this model year. Where a mileage was given, the median is 38,000 miles. 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.
“The contact stated while driving 30 MPH on the highway, the rod bearing fractured along the engine without warning. This caused oil to leak onto the hot catalytic converter causing a fire to erupt within the engine compartment and spread through the air conditioning blower motor and into the cab of the vehicle. The driver exited the vehicle without injuries. The fire department was contacted and extinguished the fire. The vehicle was totaled due to the extensive fire damage. The police were on the scene and a report was taken. The dealer was alerted. Updated 10/17/2006 -”
NHTSA complaint #10165522, filed 2006-08, 38,000 miles“While driving 50-60 MPH vehicle cuts off, does not move. In five minutes it will sometimes start again. Dealer contacted, and cannot remedy the problem. Problem still exists. Provide further information.”
NHTSA complaint #835064, filed 1999-02Related service bulletins
- 10246631Sep 1, 2013Expanded Availability for Remanufacture and Return (R&R) Electronic Control Modules
Engine cooling: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2005 | 1 | 4% |
| 2004 | 2 | 7% |
| 2003 | 6 | 11% |
| 2002 | 10 | 11% |
| 2001 | 22 | 17% |
| 2000 | 37 | 17% |
| 1999 | 59 | 41% |
| 1998 | 194 | 70% |
| 1997 | 50 | 34% |
| 1996 | 43 | 29% |
| 1995 | 55 | 23% |
| 1994 | 14 | 16% |
| 1993 | 20 | 14% |
| 1992 | 9 | 8% |
| 1991 | 3 | 14% |
| 1990 | 1 | 3% |
| 1989 | 1 | 4% |
| 1987 | 3 | 16% |
Other parts of the 1991 Pontiac Bonneville
6 complaintsTransmission and drivetrain
3 complaintsElectrical system
2 complaintsLatches, locks and linkages
2 complaintsVehicle speed control
2 complaintsEquipment
1 complaintsFuel system
1 complaintsInterior lighting
1 complaintsSeat belts
1 complaintsSeats
1 complaintsBody and structure
1 complaints
← All problems reported for the 1991 Pontiac Bonneville
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 31, 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