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 the federal safety agency campaign id number 96v015000 (power train:automatic transmission:cooling unit and lines); therefore, they would not assume responsibility for the repair. The vehicle has not been repaired. The failure and current mileages were 190,000.
The worst 1991 Pontiac Bonneville problems
Ranked by number of owner complaints. Mileage and cost come from what owners wrote.
- Brakes6
- Engine3
- Transmission3
- Acceleration2
- Electrical2
Problems by type
Tap a problem to see which part fails, at what mileage and in which other years.
- Brakes6
- Engine3
- Transmission3
- Acceleration2
- Electrical2
- Locks2
- Body1
- Fuel system1
- Lights1
- Seat belts1
- Seats1
Recalls 1
Power train: automatic transmission
- What is wrong
- The console mounted shift lever may disengage from the shift control cable bracket causing loss of gear indicator reference and shift selector operation.
- Risk
- The driver can place the gear shifter in the parkposition without setting the parking brake and the transaxle may not actually bein park, resulting in unexpected vehicle movement if the vehicle is stopped on agrade. Also, the driver can place the gear selector in drive or reverse withoutturning the engine off and the transaxle may not be in the position indicated,causing the vehicle to move in the opposite direction. Both conditions canresult in a vehicle accident without prior warning.
- Remedy
- Install two transaxle shift control cable retaining clips.
Recall number 91V198000 · Recall details
Technical service bulletins for the 1991 Pontiac Bonneville 2
Bulletins tell dealers how to fix known problems. A warranty extension means the manufacturer pays for that repair for longer.
1991 Pontiac Bonneville fuel economy
Official EPA estimates in miles per gallon (MPGe for electric). Ranges cover trims that share the same engine.
| Engine | Drive | City | Highway | Combined |
|---|---|---|---|---|
| 3.8L 6‑cyl | FWD | 17 | 26 | 20 |
What 1991 Pontiac Bonneville owners say
Most recent owner complaints, unedited.
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. 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 -
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 replaced four times and they have all failed. The first failed 79 days after installation. The second one failed immediately while being bleed. The third on failed with less than 1 mile and the fourth one failed 150 miles later. The consumer has been in constant contact with the manufacturer. Their position is to test the master cylinder first and then the pin if necessary. Consumer feels this is unacceptable and is a safety hazard. *ph
I have changed the dash and had all wiring checked and everything is fine except that I have no dash lights could someone please tell me what the problem could be.
The battery and alternator were replaced due to failure.
Metal holding the catch pin on the underside of the hood is prone to stress cracks while driving the vehicle 55 MPH, this problem caused the hood to fly open. Problem has been reported to the dealership.
While driving on freeway I was struck by a drunk driver going approx. 70-75mph. I was hit in the left rear of the car and I was immediately thrown back.after pulling over I found out that the seat back had broken and was in the fully reclined position. I was unable to pull the sear back to it's upright position, it only went half of that distance.
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.
When driving the brakes are making loud noise and consumer had front brakes put on today, and rear brakes put on last week. Has been in the shop four times for repairs, and the dealer can't determine the problem.
The fuel line from the gas tank to the engine rusted through, causing the gasoline to leak. The fuel lines are being replaced.ak
Compare the 1991 Pontiac Bonneville
Other model years
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Questions about the 1991 Pontiac Bonneville
Is the 1991 Pontiac Bonneville reliable?
Owners have filed 22 complaints about the 1991 Pontiac Bonneville, fewer than a typical Bonneville model year.
What is the most common problem with the 1991 Pontiac Bonneville?
Brakes, with 6 complaints. Next is engine (3).
How many recalls does the 1991 Pontiac Bonneville have?
1 recall, covering power train.
What year does the Pontiac Bonneville have bad brakes?
The Pontiac Bonneville model years with the most brakes complaints are 1992 (46 complaints), 1993 (45 complaints) and 1995 (25 complaints).
What gas mileage does the 1991 Pontiac Bonneville get?
Official estimates for the 1991 Pontiac Bonneville range from 20 mpg combined. The most efficient version (3.8L 6-cyl, FWD) gets 17 city and 26 highway.
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