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.
A/C quit working and water was seeping in through the passenger floorboard. The dealership said it was a clogged drain and was an issue known for the 2011 CX-9. They "unclogged" the drain and said the excess water build up had caused the A/C motor to seize. Paid $99 to have it unclogged and still ended up with no A/C.
A D V E R T I S E M E N T S
A/C quit working and water was seeping in through the passenger floorboard. The dealership said it was a clogged drain and was an issue known for the 2011 CX-9. They "unclogged" the drain and said the excess water build up had caused the A/C motor to seize. Paid $99 to have it unclogged and still ended up with no A/C.
- Jamie J., Newton, NC, US