One problem related to engine clicking and tapping noises has been reported for the 2001 Audi A4. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2001 Audi A4 based on all problems reported for the 2001 A4.
: the contact stated while driving 50 mph on the interstate, there was a popping noise from the engine compartment followed by a lost of all power. The contact managed to pull over without incident. The engine would not restart and the vehicle was towed to the dealer for inspection. The dealer determined there was a hole in the engine and was unable to identify what caused the hole, however a new engine replacement was necessary. Updated 5/10/2006 -.