Two problems related to car stall have been reported for the 2010 Subaru Impreza. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2010 Subaru Impreza based on all problems reported for the 2010 Impreza.
After 72 hours of my purchase of the 2010 Subaru Impreza wrx from Toyota boulder dealership located in boulder, colorado, I had experienced malfunctions with the starter of the vehicle. I had absolutely no fault in this situation, however I was simply misinformed and therefore purchased a vehicle that wasnt in adequate, safe conditions. On Tuesday I had experienced a lack of power when starting up the vehicle . I had no problems with the vehicle in the morning however around noon I had driven 10 miles from my work and had down shifted to 1 gear from 2nd and the vehicle stalled. The following day I had then tried to fire up the vehicle but it would not start. The electrical system was on par, the battery was at 86% of life which narrowed it down to either the starter or alternator. However by the looks and my knowledge of these types of vehicles I believe the root of the malfunction lies within the starter. The car was stationary the second time I had tried to start the vehicle.
Before the failure white smoke came out the tailpipe and the engine was hesitating. Piston #4 had a failed ringland causing the engine to fail. To correct the failure the engine had to be taken apart at the dealer and have new parts installed. The car was out of my possession for two weeks. The car had only ~8000 miles on it and it appears to be a very common problem on 2008-2010+ Subaru Impreza sti's.