CarComplaints.com Notes: The only area of real concern for 2010 Mazda CX-9 owners is the brake booster.
In 2014, Mazda extended the warranty on the 2007-2013 CX-9 brake booster to 7 years / 90,000 miles. However this extended warranty has expired, so buyer beware.
This Mazda CX-9 brake booster failure isn't terrible in terms of repair cost — it "only" costs $550 average to fix. However it is a safety issue when the brake booster fails as it increases stopping distance. Owners have reported having to stomp on the brake pedal, & crashes/injuries have been reported due to this CX-9 brake booster defect.
3.4
definitely annoying
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
38,745 miles
About These NHTSA Complaints:
This data is from the NHTSA — the US gov't agency tasked with vehicle safety. Complaints are spread across multiple & redundant categories, & are not organized by problem.
So how do you find out what problems are occurring? For this NHTSA complaint data, the only way is to read through the comments below. Any duplicates or errors? It's not us.
Safety issue: Vehicle could not be safely driven. The power lift gate got stuck fully open and would not move up or down. It could not be shut manually. The rod holding the door which is pulled down into the motor would not budge. The vehicle could not be safely driven with the hatch stuck open like that. I had to find a way to disengage the rod from the life gate. Still, even with the rod disengaged, it could not be fully shut. I was able to tie down the hatch half way shut so that I could drive it to a dealership to be repaired. By researching similar problems other Cx-9 owners had, I was able to determine that insulation around the worm gear of the motor, behind the left rear panel, had loosened and gotten caught in the worm gear. This is a problem that is related to construction of the vehicle, since the insulation is behind a secured panel and not accessible by the operator.
- North Attleboro, MA, USA
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- North Attleboro, MA, USA