Vehicle recall 21V707000 · September 13, 2021
2021 Audi e-tron
Corrosion in the brake booster may cause the Anti-Lock Brake System (ABS), Electronic Stability Control (ESC), speedometer display, and brake assist to stop functioning.
Source: NHTSA data as of September 22, 2026. Last refreshed Sep 23, 2026, 2:43 AM UTC.
- Summary
- Volkswagen Group of America, Inc. (Audi) is recalling certain 2021 Audi E-Tron Quattro and E-Tron Sportback Quattro vehicles. Corrosion in the brake booster may cause the Anti-Lock Brake System (ABS), Electronic Stability Control (ESC), speedometer display, and brake assist to stop functioning.
- Consequence
- A loss of braking assist, ABS, and ESC will increase the effort and distance required to stop, increasing the risk of a crash.
- Remedy
- Dealers will replace the brake booster, free of charge. Owner notification letters were mailed September 30, 2021. Owners may contact Audi customer service at 1-800-253-2834. Audi's number for this recall is 47R7.
- Notes
- Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.nhtsa.gov.
Recall details
- NHTSA campaign
- 21V707000
- Reported to NHTSA
- September 13, 2021
- Filed by
- Volkswagen Group of America, Inc.
- Manufacturer campaign
- 47R7
- Owner notification
- September 30, 2021
- Vehicles potentially affected
- 38
- Initiated by
- the manufacturer
- Components
- Service brakes, hydraulic › Antilock/traction control/electronic limited slip; Service brakes, hydraulic
Vehicles covered
As listed by NHTSA. A recall usually covers only some vehicles of each model and year, often a production date range.
- Audi e-tron (2021): 2021
Has your Audi been repaired?
Recalls here come from NHTSA’s records for the model and year. Not every vehicle of a model is included in every recall, and this site can’t see whether a repair has been done. Only a VIN lookup can tell you that.
NHTSA’s VIN search doesn’t show recalls that were already repaired, recalls more than 15 years old, or some small manufacturers’ recalls. A Audi dealer can also check your VIN. Recall repairs are free.