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.
This vehicle has never been in an accident on the front side and yet because the seal failed for who knows why, the system was corroded which meant the entire HID system needed to be replaced. $4000. That is not a typo. $4 freaking thousand dollars! Aaaaargghhhhh! The only other real problem I have had with the vehicle is an oil leak from a gasket that needed to be replaced and failing power windows. This issue puts them all to shame.
A D V E R T I S E M E N T S
This vehicle has never been in an accident on the front side and yet because the seal failed for who knows why, the system was corroded which meant the entire HID system needed to be replaced. $4000. That is not a typo. $4 freaking thousand dollars! Aaaaargghhhhh! The only other real problem I have had with the vehicle is an oil leak from a gasket that needed to be replaced and failing power windows. This issue puts them all to shame.
- Steven M., Butner, NC, US