# NHTSA recall 21V707000

A recall listed here may apply to a vehicle of this year, make and model. Only the manufacturer can say whether it applies to one vehicle: check the VIN with the official lookups.

- Published by: NHTSA \(United States\)
- Campaign number: 21V707000
- Manufacturer's number: 47R7
- Manufacturer: Volkswagen Group of America, Inc.
- Reported: 2021\-09\-13
- Owners notified: 2021\-09\-30
- Component: SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP; SERVICE BRAKES, HYDRAULIC
- Units potentially affected: 38
- Part numbers: 4KE.614.100 \*

## What is wrong

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.


## What can happen

A loss of braking assist, ABS, and ESC will increase the effort and distance required to stop, increasing the risk of a crash.


## The 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.


## Remedy progress the manufacturer reported

- Report: Annual report 1, for 2023 quarter 3 to 2024 quarter 2
- Filed with NHTSA: 2024\-07\-30
- Vehicles in the campaign: 38
- Reported remedied: 38 \(100%\)
- Reported unreachable: 0
- Reported removed: 0

These are the manufacturer's totals for the whole campaign at the end of 2024 quarter 2, as filed with NHTSA. They do not say whether one vehicle has been remedied: check the VIN with the official lookups. The reports are from data as of 2026\-10\-19.

## Vehicles this campaign lists

- [2021 AUDI E\-TRON](/makes/audi/e-tron/2021/recalls.md)

## Bulletins for the same vehicles and component

A bulletin is the manufacturer's note to its dealers. It is not part of this recall.

- [A4524412073483\_1](/bulletins/10252469.md), 2024-04-04, Service bulletin
- [A4524392072977\_1](/bulletins/10250553.md), 2024-03-06, Service bulletin
- [A4523362072304\_1](/bulletins/10247205.md), 2024-01-04, Service bulletin
- [A4623452070679\_1](/bulletins/10238235.md), 2023-07-10, Service bulletin
- [A4523332061908\_4](/bulletins/10237390.md), 2023-06-06, Service bulletin

## Check a VIN

- [NHTSA recall lookup by VIN, United States](https://www.nhtsa.gov/recalls)
- [Transport Canada recall search, Canada](https://wwwapps.tc.gc.ca/Saf-Sec-Sur/7/VRDB-BDRV/search-recherche/menu.aspx?lang=eng)

JSON: [/v1/recalls/nhtsa/21V707000](/v1/recalls/nhtsa/21V707000)

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