One problem related to blind spot detection has been reported for the 2014 Mazda CX9. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2014 Mazda CX9 based on all problems reported for the 2014 CX9.
Breaks became very hard to press and I was having trouble stopping the car. I could not drive it to the Mazda dealer who was too far. I took a chance and drove a few miles to local break shop. They replaced the master cylinder and the break booster. Parts and labor were $1083. 87.