2010 Mazda CX7 (130,000 miles) hesitates now when accelerating and is throwing a random misfire code on cylinder 3. We just recently had the 2 gaskets by the turbo changed by the dealer within the past month. Today we changed the spark plug and coils and that didn't help. :-( So disappointed with this car as I only had it 3 months and it was running good when I got it.