Two problems related to warning light on have been reported for the 2005 Audi A4. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2005 Audi A4 based on all problems reported for the 2005 A4.
Despite the passenger air bag being replaced a few years ago; I continue to get warning light and now is not function. Albany Audi says there is no recall and it will cost me $150 to diagnose. I have spoken with several mechanics who attest to problems with recalled replacement bags.
The air bag warning light activated approx. Mid January, 2009. There were no events leading to this failure. Since the light originally turned on, it has been continually on, indicating a problem with the vehicles airbag. The vehicle was taken to the dealership, where technicians described this problem as a normal occurrence in the 2005 Audi A4's. He stated that this has occurred so frequently that he knew the problem before hooking the vehicle up to diagnostic equipment. This was also confirmed with the service department assistant manager.