Which parts fail
Components named in complaints (engine, cooling system, oil leaks, timing chain, exhaust).
Mileage when the problem started
Owner reports
Selected complaints filed with NHTSA by 2007 Pontiac G6 owners, lightly cleaned up (personal details are redacted by NHTSA).
The contact owns a 2007 Pontiac G6. The contact stated that while driving 25 MPH, the vehicle lost motive power and stalled. The vehicle failed to start and the vehicle was smoking. There was an abnormal burning odor after the failure. The power steering and brakes became inoperable. The steering wheel was difficult to turn. The failure persisted over time. The check engine warning light and ABS warning light were illuminated. The vehicle was towed. The Fire Department was on the scene. The Police advised the contact to go through civil court. The contact believed that the wiring and transmissions were the cause of the failure. The power steering rack was replaced by an independent mechanic. The service center was no longer communicating with the contact and requested that the vehicle be removed from the property. The failure mileage was approximately 137,000.
The contact owns a 2007 Pontiac G6. The contact stated that while driving at an undisclosed speed, the steering wheel seized, with the air bag warning light and check engine warning light illuminated. The contact stated that the steering wheel became difficult to turn, and the vehicle was nearly involved in a T-bone crash. The contact forcefully turned the steering wheel to regain control of the vehicle. The vehicle was taken to the dealer; however, it was neither diagnosed nor repaired. The manufacturer was made aware of the failure. The failure mileage was approximately 251,000.
My vehicle was stationary at a red light waiting to turn left on a city street in park, as I tried shifting gears back to drive the car jerked forward very intensely ' which it has done multiple times before' . Before reaching the drive position. It then proceeded forward out of my control into the back of a truck linking my front bumper to the hinge on the back of the truck.. In the midst of that I immediately tried shifting into reverse but doing so was very difficult has the car kept pressing forward into the back of the truck, so I put the car in park then back to reverse when it finally shifted into the reverse gear vigorously which then abled be to detach from the truck. I pulled to the nearest parking lot to check the damage, and seen multiple leaks not sure where from.
Our Pontiac G6 hardtop convertible caught fire without any notice. The car had been previously driven at 75 MPH for an hour an and a half. It sat for 5 hours and then when we were driving at 10 MPH, it suddenly caught fire.
May 2013 engine shuts off when manually downshifting. Restarts shortly afterwards. April 2014 engine shuts off after decelerating to drive over a speed hump. Will not immediately restart and must be towed. Tow truck driver is able to get car started by jiggling the key. April 28, 2015 engine shuts off while waiting at stoplight. Will not restart and must be towed. Again, tow truck driver jiggles the key to start the engine. April 30, 2015 fuel system service and adjust loose transmission cable - $203.25 check engine light comes back on the next day. May 8, 2015 engine shuts off after decelerating to drive over a speed hump. Restarts shortly afterwards. May 15, 2015 engine shuts off while coming to a stop to let a car in front turn left. Car restarts after a few minutes. Every time the engine shuts off, the power steering and power breaks fail as well. …
Vehicle has been sitting since the first of February due to a constant coolant leak. Leak first appeared at bottom corner passenger side of radiator, and within a week had also showed up on bottom corner driver side of radiator. Eventually wound up replacing the overflow reservoir, 3/4" hose tee located directly under overflow, several clamps, transmission cooling lines, installed brand new radiator and oil pressure switch located directly above oil filter. After 10 days with absolutely no leaks, they reappeared in exactly the same locations. Finally traced leak on passenger side to upper corner passenger side of intake manifold gasket, and the driver side leak traces to almost directly at the coolant crossover pipe gasket. Now, I'm again facing another $200 payout to the parts store.! I'm going to make this repair myself, as I have made all repairs for the previous 6 months. …
While driving on highway at 60 MPH on highway right line almost at my exit . The GPS fell from the window and must of hit the area of the shift column it didn't come out of drive though. The car shut off. I was able to move over to the shoulder push the flashes and emergency break when the brakes did not work just a large nose steering didn't work well. Bringing it to the dealership and have them check the steering column out again. This is the 2nd time the car shut off while driving I feel this is a part of the original recall in 2015 that listed this make, model and year Pontiac G6 2007 massachusetts route 2 west leominster. Ma. Restarted the car, got to my destination, and drove home that night lower speeds.
Tl* the contact owns a 2007 Pontiac G6. While attempting to drive, the vehicle failed to start. In addition, while driving down the road, the vehicle lost power and "error" appeared on the instrument panel. The contact pushed the vehicle off the road into a parking lot and had the vehicle towed to his residence. Three days later, the failure recurred. The contact called terre haute Chevrolet (located at 5377 s us hwy 41, terre haute, in 47802, [phone]) and was informed that there were no recalls on the vehicle. The vehicle was not taken to a dealer and was not repaired. The manufacturer was not notified of the failure. The approximate failure mileage was 50,000.
While driving on the express way, all of a sudden the reduced engine power / service traction control alert comes on..I have an 07 pontic G6 that keeps giving me a "reduced engine power" message, then cuts your power and you can't drive more than about 30 MPH. This is so dangerous to have the power go from 70 MPH to 30, it keeps doing that. I have replaced the gas peddle ($180) and it still does that, so I am have the throddle body replaced, god knows what that is going to cost me. Is there any recalls on this happening to others? Like I said, it is very dangerour when your pulling out in front of cars and it does this.
Tl* the contact owns a 2007 Pontiac G6. While driving at an unknown speed and attempting to dim the headlights, the headlights malfunctioned and turned off without warning. The contact mentioned that the headlights came back on once the high beams were activated. In addition, the contact mentioned that the oil warning light was illuminated. After inspecting the vehicle, the contact noticed an oil leak coming from the engine. The vehicle was not taken to the dealer. The manufacturer was made aware of the failures. The vehicle was not repaired. The failure mileage was 174,000.
Engine complaints in other G6 years
Frequently asked questions
How common are engine problems on the 2007 Pontiac G6?
NHTSA has 58 complaints about the engine & cooling of the 2007 Pontiac G6, 5% of the model year's 1,232 complaints. The component named most often is engine (3 mentions).
Is there a recall for 2007 Pontiac G6 engine problems?
No. NHTSA lists no engine & cooling recall for the 2007 Pontiac G6, though it has 4 recalls 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 2007 Pontiac G6 engine problems start?
Half of the complaints with a recorded mileage happened before about 90,000 miles, and 10% before 25,000 miles.
Is it dangerous?
Owners linked 2 crashes, 3 fires and 1 injury to engine & cooling 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.