Most common 2005 Pontiac Bonneville problems
Share of the 27 complaints; one complaint can involve more than one system. "~" is the median mileage when the problem started.
Pontiac Bonneville complaints by model year
Best Bonneville years: 2005, 2004, 2003. Years to avoid: 1998, 1995, 2000. Compare all years →
What 2005 Pontiac Bonneville owners say
Air bags
Tl* the contact owns a 2005 Pontiac Bonneville. The contact stated that the vehicle suddenly loss power and stalled. The contact stated another vehicle crashed into the rear of the vehicle and the airbags did not deploy. A police report was filed. The contact suffered minor injuries and was hospitalized. The vehicle was taken to a private mechanic where it was diagnosed but the repairs were unknown. The vehicle was repaired. The manufacturer was not made aware of the failure. The failure mileage was 137,000 and the current mileage was 158,000.
Started the car one morning and the air bag light came on and won't go off. Don't know if this is serious or not . Can't afford to have it checked right now. There is a big airbag recall right now, just wondering if my car could be a danger. Also our temp gauge has stopped working and our radio dash light has went out ..maybe a dash board problem with these vehicles
Electrical system
Started up my car and the air bag light went on and won't go off. Also having problems with electrical lights in the dash. Part of the lights for the speedometer/air-conditioner buttons are only 1/2 working and part of the lights on the radio don't light up either. After reading several of these it sounds like this is a big issue with this model of car.
"Takata recall" unusual engine noise car won't brake fumes coming inside the car. Car shaking and vibrating low oil pressure even when I got a oil change. After oil change car wouldn't go no more than 16 miles per hour. Car will not crank if it's 47 degrees or lower temperature. In motion in city street and highway
Steering
2005 Pontiac Bonneville, clunking noise in steering. Per dealer, intermediate shaft is manufacturer known problem, while under warranty shaft was lubed, then replaced, then lubed again. Problem persists and is worse in cold weather. Steering becomes less than accurate providing improper road feedback and improper response to driver input. My concern is that shaft will fail or will cause other steering failure. This has been a persistent problem since ownership taken 4 sept 2004.
Magnasteer issue: extremely difficult steering at low speeds (below 15 MPH) when vehicle is at operating temperature. Summer time conditions enhance this problem. When the steering fluid heats up, the steering becomes more difficult or impossible. The magnasteer rack has been replaced 1 time. This cured the problem temporarily (1000 miles). The dealership has worked feverishly and extremely well to correct the problem. Problem unresolved so far.
2005 Pontiac Bonneville engines & fuel economy
| Engine | Transmission | Drive | MPG city / hwy / combined |
|---|---|---|---|
| 3.8L 6-cyl | 4-speed automatic | FWD | 18 / 27 / 21 |
| 4.6L 8-cyl | 4-speed automatic | FWD | 15 / 22 / 18 |
EPA ratings. Class: Large car.
Frequently asked questions
Is the 2005 Pontiac Bonneville a good car?
Based on 27 owner complaints filed with NHTSA, the 2005 Bonneville rates better than average: 90% fewer complaints than a typical year of the Bonneville at the same age. It is one of the best Bonneville years by this measure. Complaint counts don't account for sales volume or individual maintenance, so have any used car inspected before buying.
What is the most common problem with the 2005 Pontiac Bonneville?
The air bags — 12 complaints, 44% of all complaints for this model year. Next are the electrical system (8) and steering (5).
How many recalls does the 2005 Pontiac Bonneville have?
NHTSA lists no recalls for the 2005 Pontiac Bonneville. You can still confirm with your VIN using our VIN recall check.
What are the best and worst years of the Pontiac Bonneville?
The best years by complaints, compared at the same age, are 2005, 2004 and 2003. Years to avoid or approach with caution: 1998, 1995 and 2000. See the full Pontiac Bonneville years comparison.
At what mileage do 2005 Pontiac Bonneville problems happen?
The median mileage reported in complaints is about 122,000 miles; 19% of problems with a recorded mileage started before 50,000 miles.
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.