One problem related to warning light on has been reported for the 2001 Audi S4. The most recently reported issues are listed below.
Cold start on a cold January morning (5 degrees f); upon starting the car the air bag warning light came on and would not shut off. Research (discussions with the dealer and air bag repair businesses) indicate that this is a very common defect for Audi S4, model year 2001 and that to repair the problem the air bag control module (computer) would need to be replaced at an exorbitant cost. Airbag system is completely inoperable with the warning light in a lit state. On line Audi forums indicate that this is a huge problem on these cars.
| Warning Light On problems | |
| Air Bag Not Deploy problems |