Driver side: inflator module
Risk. In the event of a crash necessitating air bag deployment, the air bag may not properly protect the occupant, increasing the risk of serious injury or death.
NHTSA has logged 22 owner complaints about the 2002 Audi S4, most often about the electrical system. It is covered by 1 safety recall, and for recall 21V-470 the manufacturer reports only 5% of affected cars repaired.

Source: NHTSA complaints, recalls, investigations and manufacturer recall reports, through June 23, 2021. Updated daily. Photo: IFCAR, Public domain.
22 complaints grouped by the system owners reported.
| System | Complaints | Crash, fire or injury |
|---|---|---|
| Electrical system | 10 | 0 |
| Service brakes, hydraulic | 9 | 0 |
| Seats | 3 | 0 |
| Engine and engine cooling | 1 | 0 |
| Equipment | 1 | 0 |
Source: NHTSA Office of Defects Investigation. Complaints are submitted by the public and are not verified by NHTSA.
Each ring shows the share of affected cars repaired, from the manufacturer’s latest quarterly report to NHTSA. Recall repairs are free at authorized dealers.
Risk. In the event of a crash necessitating air bag deployment, the air bag may not properly protect the occupant, increasing the risk of serious injury or death.
Recalls apply to specific cars. To see whether a recall is still open on yours, enter the 17-character VIN at nhtsa.gov/recalls or with Audi.
Bars show complaints per model year. Colors show the CarFlaw verdict: complaints weighted for crashes, fires and injuries, adjusted for years on the road and compared with the S4 median. How we score
2002 Audi S4 4-DR. w/SAB in NHTSA's New Car Assessment Program. Photos are from NHTSA's crash tests.
Recent electrical system complaints filed with NHTSA, shortened. Personal details are removed.
TL*THE CONTACT OWN A 2002 AUDI S4. THE CENTER INSTRUMENT PANEL DISPLAY INTERMITTENTLY FAILED TO ILLUMINATE. WHEN THE FAILURE OCCURRED HALF OF THE DISPLAY WAS WELL LIT WHILE THE OTHER HALF WAS NOT. OCCASIONALLY THERE WAS ALSO AN ODOR SIMILAR TO ELECTRICAL SMOKE. THE DEALER WAS NOT NOTIFIED OF THE…
TL*THE CONTACT OWNS A 2002 AUDI S4. THE CONTACT STATED THAT THE LCD SCREEN ON THE INSTRUMENT PANEL HAS LINES RUNNING THROUGH THE SCREEN, WHICH PREVENT HIM FROM VIEWING THE INFORMATION. HE HAS NOT YET TAKEN THE VEHICLE TO THE DEALER. THE FAILURE MILEAGE WAS 57,000. UPDATED 5/5/09 *CN UPDATED…
TL*THE CONTACT OWNS A 2002 AUDI S4. WHILE DRIVING APPROXIMATELY 45 MPH ON NORMAL ROAD CONDITIONS, THE INSTRUMENT PANEL DISPLAYED MISSING AND FADED PIXELS, AS WELL AS INCOMPLETE INFORMATION ABOUT THE VEHICLE. THE FAILURE OCCURRED WITHOUT WARNING. THE VEHICLE HAS NOT BEEN REPAIRED. THE FAILURE…
Decode your VIN to see the recalls for your exact car, then confirm open recalls with NHTSA.