CarComplaints.com Notes: The only area of real concern for 2011 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.
So the Mazda CX-9 has a defect in the a/c condensation drain. The drain gets clogged with debris easily and then builds up and by the time you realize it is clogged, the water has burnt out the a/c blower motor. You can hear the water sloshing in the tank and sometimes when turning left it will slosh out on the front passenger floor. We have a 2011 but this problem is reported in other years of the CX-9. We called Mazda and they just kept apologizing for the inconvenience but did nothing.
A D V E R T I S E M E N T S
So the Mazda CX-9 has a defect in the a/c condensation drain. The drain gets clogged with debris easily and then builds up and by the time you realize it is clogged, the water has burnt out the a/c blower motor. You can hear the water sloshing in the tank and sometimes when turning left it will slosh out on the front passenger floor. We have a 2011 but this problem is reported in other years of the CX-9. We called Mazda and they just kept apologizing for the inconvenience but did nothing.
- Cathy D., Raleigh, US