Head gasket blown on 2004 Pontiac Aztek rally, 3.4L engine, 39,880 miles. I bought this car used 3 months ago with 37,000 miles at southtowne Hyundai in riverdale, ga - 770-471-1000. They told me the car was mechanically sound and had passed a 60-point inspection. Recently, upon driving up a 5-mile hill, about midway the car started overheating. I let it cool down, turned off the A/C, turned on the heater and drove back approx. 5 miles to the nearest service station. The car did not indicate any more overheating. Tech's could not find a leak. There was no more overheating until a couple of weeks later. On my way to get an oil change, it happened again. Took it to Pontiac service department. They diagnosed a blown head gasket. I researched the internet, this seems to be a common failure for this particular car. Pontiac said it will fix free of charge if I pay $1,100 for maintenance service (replacing all fluids - which had been done 3,000 miles ago at the southtowne Hyundai). Lucky for me, the head gasket did not blow on a highway or heavy traffic but close to the dealership. I am now waiting for repairs through Pontiac.

- Atlanta, GA, USA

Intermittently the 3.4L engine would stalls while driving at low speed of 10 mph or less. Vehicle would restart. The vehicle had been to the dealer on one occasion, and they were unable to duplicate the problem. Consumer will be taking the vehicle back in for another inspection.

- Willoughby, OH, USA

Vehicle stalled while driving. Dealership replaced the fuel pressure regulator, but the failure recurred.

- Canton, OH, USA