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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.
10.0
really awful- Typical Repair Cost:
- No data
- Average Mileage:
- 83,600 miles
- Total Complaints:
- 4 complaints
Most Common Solutions:
- not sure (4 reports)
brakes problem
Helpful websites
- No one has added a helpful site for this 2011 CX-9 problem yet. Be the first!
A D V E R T I S E M E N T S
I have been reading some of the other complaints and it seems that my vehicle may be having the brake booster diaphragm leakage problem. Today the vehicle became hard to brake like the pedal was pushing my foot back up while I was trying to press it down to stop. I turned radio off and listened and there is this hissing noise like air leakage when the brake is applied on the inside around the brake pedal. At this time when car is rolling down hill the braking is not bringing the car to a complete stop, so therefore the car is not drive-able at this time. I can not go without a car and can't put my kids in the car with it like this. This should have been recalled and repaired by the manufacturer. I don't know if there is any kind of extended warranty still available to help get this repaired but if this is going to be an expensive fix then it will be parked for some time.
- Lisa P., Maysville, KY, US