1991 Pontiac Bonneville problems & reliability
22 owner complaints filed with NHTSA for the 1991 Pontiac Bonneville. Last verified Aug 7, 2026. Complaints are unverified reports submitted by owners to the federal Office of Defects Investigation.
Each complaint is counted once (by NHTSA case number), even when it names several vehicles.
2 complaints report injuries (2 injured).
Most reported problems
| Component | Complaints | Share |
|---|---|---|
| Service Brakes, Hydraulic | 6 | 27% |
| Engine and Engine Cooling | 3 | 14% |
| Power Train | 3 | 14% |
| Electrical System | 2 | 9% |
| Latches/locks/linkages | 2 | 9% |
| Vehicle Speed Control | 2 | 9% |
| Equipment | 1 | 5% |
| Fuel System, Gasoline | 1 | 5% |
| Interior Lighting | 1 | 5% |
| Seat Belts | 1 | 5% |
Component groups as classified by NHTSA. A complaint can name more than one component, so shares may sum to more than 100%.
Complaints by incident year
What owners report
“Tl*the contact owns a 1991 pontiac bonneville. While driving approximately 45 mph in cold weather conditions, the transmission oil cooler line separated and caused transmission fluid to leak excessively. The vehicle was towed to the dealer and they stated that the vin was not included in nhtsa campaign id number…”
Power Train · filed Dec 3, 2008
“Dt*: 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…”
Engine and Engine Cooling · filed Aug 15, 2006
“Consumer stated that after market master cylinder had to be replaced on three occasions because the plunger pin kept breaking. This caused brake pedal to go to the floor when brakes were applied. Unable to get in contact with the manufacturer, fenco / fenwick automotive products.*ak consumer had the master cylinder…”
Service Brakes, Hydraulic · filed Sep 30, 2003
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Technical service bulletins
2 manufacturer communications (TSBs, service campaigns, warranty extensions) are on file with NHTSA for the 1991 Pontiac Bonneville.
Expanded Availability for Remanufacture and Return (R&R) Electronic Control Modules
130089009 · Service Bulletin/Repair Instructions · issued Sep 1, 2013
Excessive vibration of electrochromic inside rearview mirror. *tw
731608 · Service Bulletin/Repair Instructions · issued Jun 1, 1997
TSBs are repair guidance manufacturers send to dealers — they are not recalls and repairs are not automatically free. Full documents are available on NHTSA’s site.
Safety recalls
No NHTSA recall campaigns name the 1991 Pontiac Bonneville in our current data. Recalls may apply only to certain VIN ranges — always confirm with a VIN check.
Check whether your specific vehicle is affected
Recall campaigns often cover only certain VIN ranges. Enter your VIN on the official NHTSA site to confirm whether your vehicle is included and whether the repair is still open.
Check VIN on NHTSA →Buying a used 1991 Pontiac Bonneville?
- · Decode the seller’s VIN with our free VIN decoder to confirm the exact year, engine and trim.
- · Check for unrepaired recalls by VIN on NHTSA’s official lookup — recall repairs are free.