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Tesla Model 3 Recall 21V846: False Braking Alerts Could Cause Sudden Stops

NHTSA campaign 21V846, reported October 29, 2021, 11,728 vehicles potentially affected.

What this recall means for you

Some Tesla vehicles from 2017 to 2019 may have a communication error in their forward collision avoidance system. The error can trigger false forward-collision warnings or cause the automatic emergency braking system to activate unexpectedly, which may bring the car to a sudden stop.

An unexpected emergency stop increases the risk of a crash, particularly if drivers behind you are not expecting it. The problem affects vehicles running software version 2021.36.5.2.

Tesla is providing a free over-the-air software update to fix the problem. Owners can contact Tesla customer service at 1-877-798-3752, and you can check your VIN for open recalls to confirm whether your vehicle is affected.

Check whether this recall is open on your vehicle

The repair is normally free at an authorized dealer.

Official recall notice

Safety recall 21V846Tesla, Inc.
Component
FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING; FORWARD COLLISION AVOIDANCE: SENSING SYSTEM: CAMERA; FORWARD COLLISION AVOIDANCE: WARNINGS; FORWARD COLLISION AVOIDANCE:SOFTWARE
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.
Risk
Unexpected activation of the AEB system may cause the car to stop suddenly, increasing the risk of a crash.
Remedy
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.
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

Tesla Model 320172018201920202021
Tesla Model S20172018201920202021
Tesla Model X20172018201920202021
Tesla Model Y20202021