Eight problems related to power train have been reported for the 2008 Mazda CX9. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2008 Mazda CX9 based on all problems reported for the 2008 CX9.
Once you get to 70mph it starts shaking like if a the wheels will fall off.
Knock or hard shift in park as well as in reverse keeps burning oil had everything flushed replaced all fluids valve cover gaskets spark plugs etc.
When accelerating after driving for a few minutes maybe 10-15 after the vehicle has had time to warm up, as I am applying pressure to the gas pedal and it is shifting into gears (usually into gears 3,4, & 5) the vehicle is showing that it is into the next gear but you feel it shift after the fact so it is delayed and as accelerating it feels as though it is lagging and trying to shift but can't fully right away. I am only submitting this complaint because I know a couple others with this make of vehicle but different years and they stated they have the same issue with their vehicle as well.
After changing gears, 4th to 6th, the car start making hard shifting, ratling. This sound, goes and came in time to time.
In motion, after accelerating, I let up off the gas after reaching 60mph on the freeway and there is a clunking sound accompanied with a jerk coming from the rear end of the vehicle. After slowing, when I lightly step on the gas to maintain a speed it has the clunking sound accompanied by a jerk as well.
The contact owns a 2008 Mazda cx-9. The contact smelled burning rubber and heard a clicking sound when driving the vehicle. The vehicle was not diagnosed nor repaired. The manufacturer was not notified of the failure. The failure mileage was 92,000.
Front axle fell off the car. Could hear strange noise when backing up. Put in park in driveway and the car started to roll backwards. Pulled over to sidewalk and applied emergency brake. Called tow truck and axle was found under the car.
There have been a multitude of problems on the vehicle (two sets of brakes, tierod, electrical overhaul vacuum hoses. . . ) the major issue has been oil leaking. This past summer (2011) there was an oil leak. The dealer had the car for several days before diagnosing that it was the rear main seal. The seal was replaced (car was at dealer for nearly two weeks. ) this fall (2011) oil was still leaking. After several days the dealer contacted Mazda corporate and they suggested replacing the transmission, claiming it was not uncommon. The dealer replaced the transmission. Winter/spring 2012 oil still leaking, car is currently at the dealer - claiming it is the rear main seal. Again? wouldn't that have been replaced with the new transmission?.