NHTSA campaign 21V707000 · Manufacturer campaign 47R7
Audi Recall 21V-707: Possible Loss of ABS from Brake Booster Corrosion
NHTSA recall 21V707000 (Manufacturer campaign 47R7) was reported by Volkswagen Group of America, Inc. on September 13, 2021, with 38 vehicles potentially affected (per NHTSA). NHTSA's record lists the Audi E-Tron for the 2021 model year. Owners were notified on September 30, 2021, per NHTSA.
Updated daily from NHTSA's recall files
Is my vehicle included?
This page lists, by model year, the vehicles NHTSA's recall record names for campaign 21V707000 in the model years try.vin imports (1995 and later); NHTSA's own record can list more. A model year on the list doesn't mean every vehicle of that year is included, and some may already have been repaired.
To see whether a specific vehicle is included and still needs the repair, enter its VIN at nhtsa.gov/recalls.
Audi VIN check: decode a VIN to see its year, make and model.
Key facts
- NHTSA campaign
- 21V707000 (also written 21V-707 or 21V707)
- Filed by
- Volkswagen Group of America, Inc.
- Manufacturer campaign number
- 47R7
- Report received
- Potentially affected
- 38 vehicles (per NHTSA)
- Component
- Service Brakes, Hydraulic
- Owners notified
Repair completion: 100% (latest rate the manufacturer reported to NHTSA; dataset updated October 21, 2026)
NHTSA cautions against comparing completion rates across recalls or manufacturers. How try.vin reads them.
Vehicles listed for this recall
NHTSA's recall record lists these vehicles for recall 21V707000. try.vin imports model years 1995 and later, so NHTSA's own list can be longer. Model years with a try.vin recall page link to it. Build dates are NHTSA's range for a model year (per NHTSA); a vehicle built in that range is not necessarily included.
Audi
Audi E-Tron
NHTSA's recall notice
As NHTSA's recall record states it for campaign 21V707000.
Defect description
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.
Safety consequence
A loss of braking assist, ABS, and ESC will increase the effort and distance required to stop, increasing the risk of a crash.
Manufacturer 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.
Sources
Official NHTSA notice for recall 21V707000
Campaign details come from NHTSA's recall files, which try.vin imports once a day. The plain-language subject and the completion rate come from the U.S. Department of Transportation's Recalls Data dataset. How try.vin reads recall data.