One problem related to engine stall has been reported for the 2012 Mazda CX9. The most recently reported issues are listed below.
Purchased the vehicle new from davis moore Mazda- wichita, KS. For the past 4 years we have experienced multiple engine stalls as well as complete engine stopping while driving, city, highway, turning etc. Have had the car into their service dept. Many times and they keep saying it is fine ( the last time they said it might be caused by having 8 oz too much engine oil in it). We have less than 12,000 miles on it to date because we are afraid to drive it. I believe this is a very real safety issue. We have all the paperwork for each service dept. Visit. Last two visits we were treated like we were making this stuff up. This has been happening every year since purchasing.