Tesla Recall 21V-846: Forward collision avoidance

The problem

Tesla, Inc. (Tesla) is recalling certain 2017-2021 Model S, Model 3, Model X, and 2020-2021 Model Y vehicles operating software version 2021.36.5.2. A communication error may cause false forward-collision warning (FCW) or unexpected activation of the automatic emergency brake (AEB) system.

The risk

Unexpected activation of the AEB system may cause the car to stop suddenly, increasing the risk of a crash.

The fix

Tesla Service has released an over-the-air (OTA) software update, free of charge. The recall began October 25, 2021. Owners may contact Tesla customer service at 1-877-798-3752. Tesla's number for this recall is SB-21-00-004.

Recall details

NHTSA campaign	21V-846 (21V846000)
Manufacturer number	SB-21-00-004
Manufacturer	Tesla, Inc.
Component	Forward collision avoidance › Software
Report date	October 29, 2021
Owners notified	October 25, 2021
Vehicles affected	11,728
Initiated by	Manufacturer

Vehicles covered

Owner complaints about the driver assistance

Frequently asked questions

Is the recall 21V-846 repair free?

Yes. Tesla dealers will fix the problem at no cost: Tesla Service has released an over-the-air (OTA) software update, free of charge. The recall began October 25, 2021. Owners may contact Tesla customer service at 1-877-798-3752. Tesla's number for this recall is SB-21-00-004.

How do I know if my car is included?

Not every vehicle of the listed model years is affected — the recall covers 11,728 vehicles built in a certain window. Check your 17-character VIN with our VIN recall check or at nhtsa.gov/recalls.

Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.