2021 Audi E-Tron Recall: Corrosion in the brake booster may cause the Anti-Lock Brake System (ABS)…
NHTSA campaign 21V707000 · Service Brakes, Hydraulic · filed Sep 13, 2021 · verified Jul 30, 2026
The defect
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.
The risk
A loss of braking assist, ABS, and ESC will increase the effort and distance required to stop, increasing the risk of a crash.
Check whether your specific vehicle is affected
Recall campaigns often cover only certain VIN ranges. Enter your VIN on the official NHTSA site to confirm whether your vehicle is included and whether the repair is still open.
Check VIN on NHTSA →The fix — what to do
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.
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.
Affected vehicles
Related recalls
More Audi E-Tron recalls
- 2019–2025 Audi A6 and 17 other models — Please see the recall report for a complete list of models
- 2019 Audi E-Tron — Fastener that connects the brake pedal and the brake…
- 2023 Audi A3 and 13 other models — An electrical connection in the front passenger seat for…
- 2019–2022 Audi E-Tron — Certain high-voltage battery modules may overheat
- 2021–2022 Audi A7 and 6 other models — When using the industrial 220V/240V plug at the 100% charge…
Other campaigns involving Audi vehicles
Source: NHTSA recall database, campaign 21V707000 (manufacturer number 47R7). Data last verified Jul 30, 2026.