Audi is recalling 498 model year 2021 E-Tron Quattros and model year 2020-2021 E-Tron Sportback Quattros.
An improperly welded rotor and shaft may separate within the integrated brake system.
Separation of the rotor and shaft may cause a reduction in braking assistance and a loss of the Antilock Brake System (ABS) and Electronic Stability Control (ESC), 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 September 24, 2021.
Owners may contact Audi customer service at (800) 253-2834. The number for this recall is 47R1.