NHTSA lists 2 safety recalls and 67 owner complaints for the 2003 Pontiac Bonneville. Most complaints involve steering (12) and electrical system (11). The EPA rates it 19–21 mpg combined.
ON CERTAIN CADILLAC DEVILLE AND SEVILLE PASSENGER VEHICLES, FUNERAL COACHES, AND LIMOUSINES EQUIPPED WITH A V8 (4.6L) ENGINE, OLDSMOBILE AURORA PASSENGER VEHICLES EQUIPPED WITH A V8 (4.0L ) ENGINE, AND PONTIAC BONNEVILLE SSEI PASSENGER VEHICLES EQUIPPED WITH A SUPERCHARGED V6 (3.8L) ENGINE, THE FUEL TANK PRESSURE SENSORS ARE UNUSUALLY SUSCEPTIBLE TO MALFUNCTIONS. IF THE SENSOR MALFUNCTIONS, EXCESSIVE VACUUM CAN BE APPLIED DURING SELF-DIAGNOSTIC TESTING.
CERTAIN PASSENGER, MINI VANS, AND SPORT UTILITY VEHICLES HAVE AN AIR BAG INFLATOR ON THE DRIVER'S SIDE THAT COULD FRACTURE AT A WELD DURING A DEPLOYMENT.
Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.
“2003 PONTIAC BONNEVILLE SSEI WHEN TURNING THE STEERING WHEEL, LEFT OR RIGHT FROM A STOPPING POSITION A LOUD CLUNKING NOISE APPEARS. IT IS FELT THROUGH THE STEERING WHEEL AND COLUMN. WHILE DRIVING THE NOISE HAPPENS RARELY. I HAVE READ NUMEROUS ACCOUNTS OF THIS BUT NO RECALL AS OF YET. I AM WORRIED THIS IS A SAFETY CONCERN WHILE DRIVING ON THE HIGHWAYS AT HIGH SPEEDS ESPECIALLY. IS SOMETHING LOOSE AND/OR GETTING RUBBED TO CAUSE DAMAGE AND LOSS OF STEERING IN THE FUTURE? GM DEALER DEFECT? *TR”
“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…”
“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 NHTSA 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*JB”
Towing, payload and dimensions aren’t in the EPA or NHTSA data, so we don’t list them.
| Version | City | Hwy | Comb. | Fuel / yr | CO₂ g/mi |
|---|---|---|---|---|---|
| Bonneville Auto 4-spd, 6 cyl, 3.8 L · Front-Wheel Drive | 17 | 27 | 21 | $2,950 | 423 |
| Bonneville Auto 4-spd, 6 cyl, 3.8 L, Sup Charg · Front-Wheel Drive | 16 | 25 | 19 | $4,050 | 468 |
| Item | Miles | Time | Note |
|---|---|---|---|
| Engine oil & filter | 5,000–10,000 mi | 6–12 months | Follow the oil-life monitor if fitted |
| Tire rotation | 5,000–7,500 mi | Every oil change | Check pressure monthly |
| Engine air filter | 15,000–30,000 mi | 1–2 years | Sooner in dusty areas |
| Cabin air filter | 15,000–25,000 mi | 1–2 years | |
| Brake fluid | — | 2–3 years | Absorbs moisture over time |
| Coolant | 60,000–100,000 mi | 5–10 years | Long-life coolants last longer |
| Spark plugs | 60,000–100,000 mi | — | Iridium/platinum plugs at the long end |
| 12V battery | — | 3–5 years | Heat shortens battery life |
2 safety recalls as of Nov 10, 2026, according to NHTSA. Recall repairs are free at a dealer. Check your VIN to see whether your car is included and whether the repair was done.
Owners filed 67 complaints with NHTSA. The most-cited components are steering (12), electrical system (11), engine and engine cooling (10). Complaints are unverified owner reports and aren't adjusted for how many cars were sold.
The EPA rates the 2003 Pontiac Bonneville at 19–21 mpg combined, depending on engine and drivetrain (2 versions rated).