AUDI E-TRON (2021) recall — Service Brakes, Hydraulic
Audi is recalling 2021 E-TRon models with brake booster corrosion that may cause ABS, ESC, and brake assist to fail, increasing crash risk. Owners must have brake booster replaced free by dealers.
Use caution until it’s fixed
A loss of braking assist, ABS, and ESC will increase the effort and distance required to stop, increasing the risk of a crash.
Contact the company & request your remedy
What happened, in plain English
Audi is recalling certain 2021 E-TRon Quattro and E-Tron Sportback Quattro vehicles due to brake booster corrosion. This can cause the ABS, ESC, and brake assist systems to stop working, increasing stopping distance and crash risk. Read more at govinfonow.com/recall/80230-audi-2021-e-tron-brake-booster-corrosion-risks-crash.
Source Summary by GovInfoNow · govinfonow.com/recall/80230-audi-2021-e-tron-brake-booster-corrosion-risks-crash · Updated October 4, 2026 · Official notice: NHTSA #21V707000
Cite this page
“Audi 2021 E-TRON: Brake booster corrosion risks crash.” GovInfoNow, updated October 4, 2026. https://govinfonow.com/recall/80230-audi-2021-e-tron-brake-booster-corrosion-risks-crash. Based on NHTSA recall #21V707000 (https://www.nhtsa.gov/recalls?nhtsaId=21V707000).
Why it’s dangerous
Corrosion in the brake booster can cause the ABS, ESC, and brake assist systems to stop working. This increases the effort and distance needed to stop the vehicle, raising the risk of a crash.
Who’s affected
Owners of 2021 Audi E-TRon Quattro and E-Tron Sportback Quattro vehicles are affected. Drivers with these models are most at risk due to potential brake system failure.
How to tell if you have this one
Check if your vehicle is a 2021 Audi E-TRon Quattro or E-Tron Sportback Quattro. The recall was notified to owners via mail on September 30, 2021.
- Brand
Audi- Category
Vehicle
What to do — step by step
Contact Audi Customer Service
Call 1-800-253-2834 to schedule a brake booster replacement at a dealer.
Get Brake Booster Replaced
Dealers will replace the brake booster free of charge to fix the corrosion issue.
What NHTSA says to do
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.
Questions people ask
Why is my Audi E-TRon being recalled?
Corrosion in the brake booster may cause the ABS, ESC, and brake assist systems to stop working, increasing stopping distance and crash risk.
How do I know if my vehicle is affected?
Your vehicle is affected if it is a 2021 Audi E-TRon Quattro or E-Tron Sportback Quattro. Owners received notification letters by mail on September 30, 2021.
Is there a deadline for fixing the issue?
The recall remedy does not specify a deadline for the repair; dealers will replace the brake booster free of charge.
Contact Audi
We’ve drafted a message you can send Audi to request your refund or repair — edit it as you like.
Subject: Recall 21V707000 — Audi Audi Hello, I own a Audi that is covered by recall 21V707000 from Audi. The official recall notice states: 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. I’m writing to arrange the remedy described in the recall (a refund, repair, or replacement as applicable). Could you please tell me the next steps to resolve this? Thank you.
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Where this comes from
The facts (hazard, remedy, dates, manufacturer) are pulled from the official NHTSA recall record. The plain-language summary and step-by-step checklist are written by GovInfoNow to make the official notice easier to act on — they don’t replace it.
- Official source: NHTSA Recall #21V707000 (September 13, 2021)
- Plain-language summary written by qwen3:4b on October 4, 2026, from the official record above. Not reviewed by a person — if it conflicts with the NHTSA notice, the notice is correct. Report an error on this page.
- GovInfoNow is an independent service and is not a government agency. We republish official NHTSA recall data; we don’t issue, amend or administer recalls.