We don't have a lot of Audi A4 fuel system problems on file — feel free to add yours here. The most common A4 fuel system problems cost $1,200 to fix & occur at 108,000 miles. Click on a year below.

Worst Fuel System Problems
fuel pressure regulator failure 2007 Audi A4
fuel pump 2006 Audi A4
high pressure fuel pump failure 2009 Audi A4