Audi is recalling 38 model year 2021 E-Tron Quattros and E-Tron Sportback Quattros.
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.
A loss of braking assist, ABS, and ESC will increase the effort and distance required to stop, increasing the risk of a crash.
What to do
Dealers will replace the brake booster free of charge.
Owner notification letters are expected to be mailed on November 12, 2021.
Owners may contact Audi customer service at (800) 253-2834. Audi's number for this recall is 47R7.