Vehicle recall 21V846000 · October 29, 2021
Tesla Model 3, Model S and 2 more models
A communication error may cause false forward-collision warning (FCW) or unexpected activation of the automatic emergency brake (AEB) system.
Source: NHTSA data as of September 22, 2026. Last refreshed Sep 23, 2026, 2:43 AM UTC.
- Summary
- 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.
- Consequence
- 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.
Recall details
- NHTSA campaign
- 21V846000
- Reported to NHTSA
- October 29, 2021
- Filed by
- Tesla, Inc.
- Manufacturer campaign
- SB-21-00-004
- Owner notification
- October 25, 2021
- Vehicles potentially affected
- 11,728
- Initiated by
- the manufacturer
- Components
- Forward collision avoidance › Sensing system › Camera; Forward collision avoidance › Software; Forward collision avoidance › Automatic emergency braking; Forward collision avoidance › Warnings
Vehicles covered
As listed by NHTSA. A recall usually covers only some vehicles of each model and year, often a production date range.
Has your Tesla been repaired?
Recalls here come from NHTSA’s records for the model and year. Not every vehicle of a model is included in every recall, and this site can’t see whether a repair has been done. Only a VIN lookup can tell you that.
NHTSA’s VIN search doesn’t show recalls that were already repaired, recalls more than 15 years old, or some small manufacturers’ recalls. A Tesla dealer can also check your VIN. Recall repairs are free.