2017–2021 Tesla Model 3, 2017–2021 Tesla Model S, 2017–2021 Tesla Model X and 1 other model Recall: A communication error may cause false forward-collision warning (FCW) or…
NHTSA campaign 21V846000 · Forward Collision Avoidance · filed Oct 29, 2021 · verified Sep 13, 2026
The defect
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.
Check whether your specific vehicle is affected
Recall campaigns often cover only certain VIN ranges. Enter your VIN on the official NHTSA site to confirm whether your vehicle is included and whether the repair is still open.
Check VIN on NHTSA →The fix — what to do
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.
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
Related recalls
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Other campaigns involving Tesla vehicles
Source: NHTSA recall database, campaign 21V846000 (manufacturer number SB-21-00-004). Data last verified Sep 13, 2026.