Hello I own a 2011 Mazda CX7, It has run just great hasn't given me problems but I think I did it. My engine light came on 2 hours from my home. I took it to autozone they were nice enough to give me code, I forgot what it was but they showed me its yours 2 cylinder misfire. I asked him if I can drive home like that he said yes it will shake but you're okay and he was right, he also advised when you get home change out the connectors and redo the test, if your getting the same code its your engine coil and you can switch that out. I got home and switched the two inside connectors as I was advised too, but when I went to turn it on, it did not turn over, so I went ahead and replaced the 2 inside engine coils and all 4 spark plugs and the Mazda is still not turning over, I do not know what I did and I have a feeling it could be something electrical....Any suggestions??