One problem related to crankcase (pcv) has been reported for the 2010 Audi A3. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2010 Audi A3 based on all problems reported for the 2010 A3.
Going 55 mile an hour, rear turbo seal goes out, sucks engine oil out of crankcase. I coast to a stop. Load on a trailer. Haul to a Audi dealer. Still under warranty they replace engine. Now they say transmission is not repairable. Now I have to pay for new transmission. Drive train was still under warranty. Never buy another Audi again. Audi has had the car for 2 months still don't have the car back.