CarComplaints.com Notes: The only area of real concern for 2013 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 for most affected CX-9 owners, 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.
We noticed a whining/scratching noise coming from under the car and eventually a rotten egg smell.
Had the car towed to the mazda dealer, per the technician's suggestion not to drive the car the 50 miles there. I was ready to rant about why my car was left inoperable at less than 70000 miles, right after the warranty expired.
They replaced the transfer unit along with 4 gaskets and 1 ring seal. Thankfully, this repair was covered by an extended warranty by mazda.
A D V E R T I S E M E N T S
We noticed a whining/scratching noise coming from under the car and eventually a rotten egg smell.
Had the car towed to the mazda dealer, per the technician's suggestion not to drive the car the 50 miles there. I was ready to rant about why my car was left inoperable at less than 70000 miles, right after the warranty expired.
They replaced the transfer unit along with 4 gaskets and 1 ring seal. Thankfully, this repair was covered by an extended warranty by mazda.
- Katrin W., Gardnerville, US