NHTSA campaign 21V846000 · Tesla campaign SB-21-00-004
Tesla Recall 21V-846: Unexpected Activation of Automatic Emergency Brake
NHTSA recall 21V846000 (Tesla campaign SB-21-00-004) was reported by Tesla, Inc. on October 29, 2021, with 11,728 vehicles potentially affected (per NHTSA). NHTSA's record lists the Tesla Model 3, Tesla Model S, Tesla Model X and more for model years 2017–2021. Owners were notified on October 25, 2021, per NHTSA.
Updated daily from NHTSA's recall files
Is my vehicle included?
This page lists, by model year, the vehicles NHTSA's recall record names for campaign 21V846000 in the model years try.vin imports (1995 and later); NHTSA's own record can list more. A model year on the list doesn't mean every vehicle of that year is included, and some may already have been repaired.
To see whether a specific vehicle is included and still needs the repair, enter its VIN at nhtsa.gov/recalls.
Tesla VIN check: decode a VIN to see its year, make and model.
Key facts
- NHTSA campaign
- 21V846000 (also written 21V-846 or 21V846)
- Filed by
- Tesla, Inc.
- Tesla campaign number
- SB-21-00-004
- Report received
- Potentially affected
- 11,728 vehicles (per NHTSA)
- Component
- Forward Collision Avoidance — Sensing System — Camera
- Owners notified
Repair completion: 100% (latest rate the manufacturer reported to NHTSA; dataset updated October 21, 2026)
NHTSA cautions against comparing completion rates across recalls or manufacturers. How try.vin reads them.
Vehicles listed for this recall
NHTSA's recall record lists these vehicles for recall 21V846000. try.vin imports model years 1995 and later, so NHTSA's own list can be longer. Model years with a try.vin recall page link to it. Build dates are NHTSA's range for a model year (per NHTSA); a vehicle built in that range is not necessarily included.
NHTSA's recall notice
As NHTSA's recall record states it for campaign 21V846000.
Defect description
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.
Safety consequence
Unexpected activation of the AEB system may cause the car to stop suddenly, increasing the risk of a crash.
Manufacturer 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.
Sources
Official NHTSA notice for recall 21V846000
Campaign details come from NHTSA's recall files, which try.vin imports once a day. The plain-language subject and the completion rate come from the U.S. Department of Transportation's Recalls Data dataset. How try.vin reads recall data.