Hey guys (and gals) so I've had an 07 A4 2.0 T now for about 6 years (CPO) and in that time it's been solid as a rock, given me no problems whatsoever and I've kept up with maintenance pretty well . Wednesday evening (2-5-14) leaving work I get in and turn the car on with no problem at all like i've done the 20,000 previous times before that lol... A few minutes later I make a pitstop and when I get back in the car and turn the key, the car DOES NOT START. I hear the starter motor doing its thing with no problem but the engine just isn't turning over, and I try it a few more times after that but nothing. I call up my friend to see if he can come give me a jump since I'm thinking weak battery or something and in the 25-30 mins i'm waiting for him to come through I decide to give it one last crank and boom it comes to life right as he's pulling into the parking lot. He works at Autozone and suggested I swap the battery out and see if that might be the culprit and eliminate that possibility since its still under warranty so I did that on Friday (2-7-14) and the car started up no problem at all. About 10-15 mins after we finished the transaction I go and start the car and it starts with no problems but when I start backing out of the parking lot... IT SHUT OFF ON ME AGAIN. We tried cranking it a couple of times and again the starter is turning and spinning but the motor wasn't turning over. There's no "check engine" lights or messages on the cluster but just for the hell of it we tried plugging up an OBD II scanner and to no surprise it revealed nothing to us. About 20 mins later after we've racked our brains thinking of what it could be he decides to turn the key and BOOM it came to life and I left the place and made it home 30 mins later with no drama. Does anyone have any ideas what causes this, what it could be, what's the fix? Is this a common thing with these 2.0 motors? I'm trying to avoid dealer or national service chains if I can. But we're both stumped on this one....HELP!!

 

possibly the starter bendix is sticking. Its the thing that engages the flywheel to turn the motor over. If it's sticky it could just be spinning and not engaging the flywheel. Maybe? But that doesn't really explain the shutting off by itself...