There are 2 owner-reported fuel system complaints for the 2009 Audi A5in NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
AUDI A5 2009 IS NOT A RELIABLE CAR I WILL NEVER BUY ANOTHER AUDI PRODUCT IN MY LIFETIME. I CANT BELIEVE HOW I THOUGHT I WAS ALONE WITH THE MISFIRE ISSUE AND I FIND IN MY RESEARCH THERE ARE MANY OTHERS WITH THE SAME ISSUES FOR VARIOUS MODELS UNBELIEVABLE. HAD I SEARCH THIS PRODUCT, WOULD HAVE BEEN MY ONLY WISH. THE CAR WOULDN'T EVEN START UP TODAY. HAD THIS CAR FOR ONLY 8 MONTHS. AT 45,000...
AUDI A5 3.0L DIESEL QUATTRO EXPERIENCED TOTAL LOSS OF POWER. LUCKILY HAD JUST COME TO A HALT. ENGINE WILL NOT RESTART. TURNS OUT THE FAILURE OF MAIN THE MAIN DIESEL PUMP DESTROYED ENTIRE FUEL LINE SYSTEM! AUDI QUOTED 13,000K REPLACEMENT COST TO CHANGE ALL 3 PUMPS, ALL 6 INJECTORS AND CLEAN FUEL TANK! I AM SHOCKED. AUDI DEALER SAID QUITE A FEW CASES HAVE OCCURRED WITH THE EXACT SAME PROBLEM! VERY DISAPPOINTED THAT NOTHING HAS BEEN DONE ABOUT THIS KNOWN ISSUE. *TR
Complaints are unverified consumer reports submitted to NHTSA. A high complaint count may reflect vehicle popularity, not defect severity. Data sourced from NHTSA public records.
Data synced from NHTSA on Apr 26, 2026