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 143 owner complaints about the 2000 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 August 14, 2023. Updated daily. Photo: DestinationFearFan, CC BY-SA 4.0.
143 complaints grouped by the system owners reported.
| System | Complaints | Crash, fire or injury |
|---|---|---|
| Electrical system | 49 | 0 |
| Tires | 37 | 0 |
| Service brakes, hydraulic | 31 | 2 |
| Service brakes, air | 10 | 0 |
| Air bags | 6 | 4 |
| Steering | 4 | 2 |
| Engine and engine cooling | 4 | 0 |
| Equipment | 3 | 0 |
| Power train | 2 | 0 |
| 11 other systems | 12 | 2 |
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.
63kmiles, median
Based on the odometer reading in 28 electrical system complaints. 75% were reported before 100,000 miles.
Only 44% of complaints for this model year include a mileage.
Dollar amounts owners wrote in their complaints when describing a repair or a quote. These are not price estimates; a system is shown only when at least 8 owners mentioned a cost.
$1,300median
If a problem is covered by a recall, the dealer fixes it for free. Some manufacturers also reimburse owners who paid for a repair before a recall was announced.
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
Recent electrical system complaints filed with NHTSA, shortened. Personal details are removed.
THE INSTRUMENT CLUSTER ON ALL THE AUDI S4S AND ALSO ON VW LOOSE PIXELS ON THE DASH AND IT GOES OUT, IT IS A HAZARD BECAUSE THIS IS A GAUGE THAT DOES A SYSTEM CHECK EVERY TIME YOU START THE VEHICLE, THE CAR TELLS THE DRIVER IF THERE ARE BRAKE PROBLEMS, ENGINE PROBLEMS, ALSO IF LIGHTS ARE OUT I.E.…
ABS SENSOR FAILURE ON 2000 AUDI S4 QUATTRO. LIGHT CAME ON AT 114,213. LEADING TO THE BRAKE LIGHT TO FLASH ALONG SIDE OF IT AND BEEP EVERY OTHER MINUTE WHEN YOUR DRIVING DOWN THE ROAD. HAVEN'T CORRECTED THE PROBLEM BECAUSE I'VE HEARD IT COST 1,700. SOME PEOPLE DON'T HAVE THAT KIND OF MONEY. MANY…
TL*THE CONTACT OWNS A 2000 AUDI S4. THE CONTACT STATED THAT THE INSTRUMENTAL CLUSTER DOES NOT WORK IN HIS VEHICLE. OCCASIONALLY, HE IS UNABLE TO READ THE DISPLAY PANEL. THE DEALER QUOTED HIM A COST FOR THE REPAIR, BUT DID NOT PROVIDE ANY OTHER ASSISTANCE. THE FAILURE MILEAGE WAS 100,000.
Decode your VIN to see the recalls for your exact car, then confirm open recalls with NHTSA.