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Audi e-tron Recall 21V707: Corroded brake booster can disable braking assist and ABS

NHTSA campaign 21V707, reported September 13, 2021, 38 vehicles potentially affected.

What this recall means for you

Corrosion in the brake booster can cause the Anti-Lock Brake System (ABS), Electronic Stability Control (ESC), brake assist, and the speedometer display to stop working.

Without braking assist, ABS, and ESC, your vehicle will require more effort and distance to stop, which raises the risk of a crash.

An authorized Audi dealer will replace the brake booster free of charge. Owner notification letters were mailed September 30, 2021. You can also contact Audi customer service at 1-800-253-2834 (Audi recall number 47R7), and check your VIN for any open recalls.

Check whether this recall is open on your vehicle

The repair is normally free at an authorized dealer.

Official recall notice

Safety recall 21V707Volkswagen Group of America, Inc.
Component
SERVICE BRAKES, HYDRAULIC; SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP
Problem
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.
Risk
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.

Affected vehicles

Audi e-tron2021