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.
The AC/heater fan slowed and made noise with sudden stops and left turns. Was also mild "sloshing" sound behind dashboard. Technicians cleared the evaporator tank condensation drain. I have had this performed another 2 times as the symptoms recurred. Also had to have the fan motor replaced, covered by warranty. This was all in summer 2014. The symptoms have recurred May 2015 with more AC use.
A D V E R T I S E M E N T S
The AC/heater fan slowed and made noise with sudden stops and left turns. Was also mild "sloshing" sound behind dashboard. Technicians cleared the evaporator tank condensation drain. I have had this performed another 2 times as the symptoms recurred. Also had to have the fan motor replaced, covered by warranty. This was all in summer 2014. The symptoms have recurred May 2015 with more AC use.
- Jeff K., Saint Louis, MO, US