Which parts fail
Components named in complaints (battery, alternator, wiring, ignition, instrument cluster, infotainment).
Mileage when the problem started
Owner reports
Selected complaints filed with NHTSA by 1998 Pontiac Bonneville owners, lightly cleaned up (personal details are redacted by NHTSA).
About a week prior to incident, I got a whiff of a burning smell, 2 days in a row, short quick scent. Next 4 days, smelled nothing (even drove car 80 miles one way and back). Day of incident, I was traveling about 10 MPH when white smoke came from the heater vent. I increased speed to about 30 MPH to get to a safe spot, and black smoke billowed out of heat vent on top of dashboard, and front of dashboard. Turned corner to get out of traffic, came to a stop and flames shot out of cigarette lighter, and air vent in front of dash. Heater was off, radio was off, and cigarette lighter was not being used. Car fully engulfed in approximately 2-3 minutes. Car totaled.
While driving 30 MPH, the center of the dashboard caught on fire. The driver pulled over and fought the flames with an extinguisher. The cause has yet to be determined. The manufacturer denied that the fire was due to their vehicles components and that the source of the fire was from external sources. An electrical expert believes that the lead from the cigarette light caught on fire. The fuse was blown but that could have happened after the fire. The consumer's cell phone was charging in the cigarette lighter at the time of the fire.
Horn is worthless. Was hit by a party who ran a red light. Applied horn to get their attention, but it would not work. I have tried to use the horn on numerous occassions when about to be hit in a parking lot or on the street, but it never seems to work. Very hard to get to work. Airbag did not deploy even though damage required replacement of front bumper. When getting car repaired also advised that steering column bolts were stripped on one side and sheared off on the other, but not caused by accident. Estimate to fix steering another $500+
This car has had very good care/maintenance, has not been driven hard, and has only 67,000 miles on it. While driving down a city street, approximately 35 MPH, the car began to sputter. I pulled in to a parking lot and shut the car off so that I could look at the spark plug wires. I had a spark plug wire loose when this happened once before. I had no over temp, I had normal oil pressure and there was no check engine light illuminated. I did not find a noticeable problem, but I could not get the engine to start again. I had it towed home. I changed the battery, the starter, and finally checked to see if the crankshaft would turn, which it wouldn't. I removed the spark plugs and tried it again. I got antifreeze from four of the cylinders! This was determined to be because of a failed intake manifold gasket.
While driving at 25 MPH consumer smelled something burning, like electrical wires. Stopped and pulled off road. Lifted hood and burning wires smelled stronger near alternator. Touched area, and it was hot. Took vehicle to independent repair shop, and was informed that alternator failed due to bearings burning out. Front bearings caused the alternator to burn. Had to replace old alternator with a new alternator that had larger/bigger bearings, and would not wear out as fast.
1998 Pontiac Bonneville - on numreous occasions the vehicle has stalled for no apparent reason. Sometimes while moving, other times at stop signs or stoplights. Warm and cold weather. Warm and cold engine. The dealer has had it on the diagnostic machnies and even hooked up a recorder to record conditions when the stalls occur, but still no answers.
Had tune-up and regulators changed (based on recall) on 7/19/04. Then on 7/22/04 smoke emitting from exhaust and then car would not start. Car towed and repaired (manifold cracked). On 7/26/04 car taken from shop, 2 hrs later car would not start again. This time claimed starter was the problem. Consequences: over $1,500 in repairs.
Consumer disappointed with reimbursement for 1998 Pontiac Bonneville. The fuel pressure regulator was replaced. Recall campaign: 04V090000. The recall is related to the fuel pressure regulator leak. The temperature gauge was fluctuating while the vehicle was being driven. The check engine light did not come on. The consumer turned the engine off and allowed it to cool off. The consumer restarted the vehicle and heard a loud back fire with a loud bang. The vehicle did not restart. The consumer smelled fuel shortly after. The vehicle was towed to a nearby dealer. The intake plenum and the intake plenum gasket needed to be replaced. The thermostat blew out again. The consumer stated that he feels that the failures are a result of the recall issue therefore the reimbursement check was not sufficient. The consumer stated that the brakes had a ticking noise.
The alternator at a stop cannot maintain power for more than aa couple of minutes and if you have an accessorie (I.e.) your heat or defogger or the headlights it will dim to the point that if you are at a long light it will stall the car and if it is dark it is hard for other cars to see you while stopped at a light it will stall out after a min. If you have a defogger on I don't believe that I should have to go to park when I stop at a light if I need the defogger on so I can see and the dealer just told me to put it in park at a long light and they have had two other complaints that they mentioned and tech support tells them there is nothing wrong with the chargeing system thank you for your time
Traveling @65 MPH engine just shut off. Would not start until 3 hours later then it was hard to start. Problem was determined to be ground under passenger seat. Car still was hard to start now the deal claims it is the fuel pump regulator. Very upset with this experience. Other problems seem to have cropped up due to this ground problem such as alternator failure, headlights failing to the on positon, power windows would not work and of course the failure of the fuel regulator. This ground seems to be a major problem and I am surprised there has not yet been a recall. The common thread can be seen in the complaints lodged on your internet site.
Electrical complaints in other Bonneville years
Frequently asked questions
How common are electrical problems on the 1998 Pontiac Bonneville?
NHTSA has 28 complaints about the electrical system of the 1998 Pontiac Bonneville, 10% of the model year's 277 complaints. The component named most often is alternator/generator/regulator (6 mentions).
Is there a recall for 1998 Pontiac Bonneville electrical problems?
No. NHTSA lists no electrical system recall for the 1998 Pontiac Bonneville, though it has 1 recall for other components. If the problem is widespread, a repair may still be covered by an extended warranty or a manufacturer service bulletin — ask a dealer.
At what mileage do 1998 Pontiac Bonneville electrical problems start?
Half of the complaints with a recorded mileage happened before about 100,000 miles.
Is it dangerous?
Owners linked 1 crash, 6 fires and 0 injuries to electrical system problems on this model year. If you notice symptoms, have the car checked before driving further.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.