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2003 Pontiac Bonneville engine problems

15 complaints (28% of all complaints for this car). Typical mileage when it fails: 90,000.

owner complaints
15
of this car's complaints
28%
typical mileage
90,000
crashes
0
recalls
0

Which part fails

  • Engine
    2
  • Exhaust system: emission control: catalytic convertor
    1
  • Cooling system
    1

At what mileage

Complaints by mileage at the time of the problem.

0k-25k
25k-50k
50k-75k
75k-100k
100k-125k
125k-150k
150k-175k
175k-200k
200k+

Pontiac Bonneville engine problems in other years

1990199520002005

Related recalls

No recalls on record for this model year.

What 2003 Pontiac Bonneville owners say

Most recent owner complaints, unedited.

Filed Jul 14, 2026 · Electrical, Engine · CA

Look at the car the car is located [XXX] first of all you start off as a passcode 2 system and then it says passcode 3 system on the thing and I just don't want to deal with this because you have the cut off switch you have the fuel cut off switch but you still have current going through the switch or the fuel they fuel I'll probably leaking into the tank it doesn't start but still sending fuel the oil has excessive amount of liquid in it so does transmission I bought it used the guy goes you know I lost the key go in and remove it I started without the key you know or something like that and I said well here's I got the chamber and I will get it anyway I don't want to deal with this take your car around it took that he sold a mindful but it took the Kelly converter around he didn't tell me about it he asked who did it well he was the city I guess a city bought this car now they're trying to sell it I work clean the electrical Transit system to get a car doesn't work just take it just get it out of it I'm going to be blunt with you just get this XXX car off the property please thank you the XXX had no gas now it shows a full tank of gas just trying to blow me up at this XXX or what just get the XXX out my property man thank you INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Feb 12, 2018 · Engine · 113,600 miles · WI · fire

Tl* the contact owns a 2003 pontiac bonneville. While the vehicle was stopped at a stop sign, smoke emerged from underneath the hood without warning. The vehicle was taken to an independent mechanic. The contact called a local dealer (wheelers chevrolet of medford, 704 n 8th st, medford, wi 54461) and was referred to the manufacturer. The vehicle was not diagnosed or repaired. The manufacturer was notified and referred the contact to the federal safety agency. The failure mileage was approximately 113,600.

Filed Feb 12, 2016 · Engine · 75,000 miles · IL

Tl* the contact owns a 2003 pontiac bonneville. The contact stated that while moving the vehicle from its parked location, the contact noticed engine oil leaking on the ground under the vehicle. The contact also stated that the vehicle had been experiencing diminished engine power. The vehicle was not diagnosed or repaired. The VIN was not included in the federal safety agency campaign number: 15v701000 (engine and engine cooling). The manufacturer was not made aware of the failure. The failure mileage was 75,000. Updated 03/16/16

Filed Dec 10, 2015 · Engine · 70,000 miles · IL

Leaking oil, same engine as other cars in recent recall.

Filed Oct 28, 2015 · Engine · 100,000 miles · AZ

The car I drive (3.8 liter six cylinder) has an oil leak coming from the left valve cover. After I come to a stop or make a left turn, I smell oil fumes and can see a light smoke coming from the front of the car. I've been reading about the current recall for cars made before and after my car. How do I get my car on list of recalls for repair?

Filed Aug 13, 2015 · Electrical, Engine · 81,000 miles · WI

My car shuts off while driving. I notice it because power steering is hard to use and RPM's go down to zero and car has shut off. It started up again. This has been a real problem. Dealer tested car and said it was a crankshaft sensor. I replaced the crankshaft sensor and the problem continues. Cam sensor replaced too. This is a safety issue. No one knows why the car shuts off when it wants to. Now the car still shuts off while driving, but also it takes 2 to 3 times to restart. Still trying to figure this out. It is august 2015 and I need this car. Is this a recall issue?

Filed Oct 7, 2014 · Engine · 110,000 miles · NY

Tl* the contact owns a 2003 pontiac bonneville. The contact stated that while driving over a bump, the vehicle stalled. The vehicle was taken to an independent mechanic where the technician was unable to duplicate the failure. The manufacturer was made aware of the failure. The failure mileage was 110,000.

Filed Mar 17, 2014 · Engine, Transmission · MI

While driving my vehicle lost power. I shifted vehicle to neutral and attempted restart. Engine restarted. Continued driving when drive over bumps, buckles in payment engine looses power. All needle indicators drop to off position, car starts to slow down, steering looses power, all lights go out as well. This is a condition that has become increasing more dangerous as speeds increases. I had vehicle checked out and mechanics are unable to diagnosis. I previously owned 2001 pontiac bonneville as well which did the same when driven over bumps, or imperfections in the road. This is my second complaint, and I have not heard anything. I previously stated I believe this problem is related to recall gm has recently acknowledged for some cars. I don't believe they have included all vehicles that contain this problem. My previous odi (your confirmation number (odi number) is: 10564622 )this problem should be noted, and included with safety recall by gm and the federal safety agency.

Filed Feb 17, 2014 · Engine · 130,000 miles · MI

While driving my engine lost power completely. I had went over bump in the road and the vehicle lost all power. I place the car in neutral, and able to restart and continue driving. Hit bump in road again and engine lost power again. I was fortunate to be able to pull over. Restarted engine and returned home. Had repair shop check vehicle for diagnosis and they were unable to resolve issue. Neither was gm dealer. I have had this happen everytime I go over bump in road, usually at speeds over 40 miles per hour. I had same problem with 2001 bonneville. I saw gm recalling 2005 g5 with same problem. I believe my problem is related issue and is a safety hazard that should be handled similarly by gm. I do not believe the problem is limited to g5 and cobalt. As I stated 2001 and 2003 bonnevilles have same issue.

Filed Sep 6, 2012 · Engine, Fuel system · 229,000 miles · MN · fire

Acted like it was running out of gas, loss of power and speed. Only 50mph when a boom in the engine, pulled over popped the hood latch, saw smoke, exited car as flames came out of the hood. Called 911.. Car burnt to the ground. Witness stopped and told me that there is a problem with faulty fuel lines .

Questions about the 2003 Pontiac Bonneville engine

Does the 2003 Pontiac Bonneville have engine problems?

Owners have filed 15 complaints about the engine of the 2003 Pontiac Bonneville, 28% of all its complaints, more than any other problem.

At what mileage do 2003 Pontiac Bonneville engine problems start?

The typical (median) mileage in owner complaints is 90,000 miles.

Was there a recall on the 2003 Pontiac Bonneville engine?

There is no recall for this problem on this model year.

What year does the Pontiac Bonneville have bad engine?

The Pontiac Bonneville model years with the most engine complaints are 1998 (200 complaints), 1999 (60 complaints) and 1995 (56 complaints).

Other 2003 Pontiac Bonneville problems

Electrical 10Steering 10Fuel system 6Transmission 6Airbags 3Visibility 3Brakes 2Acceleration 1Body 1Driver assistance 1Lights 1Seat belts 1Seats 1Tires 1

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