Toyota Sienna 2021 — technical service bulletin
Bulletin T-SB-0031-21 · NHTSA communication 10198144 · issued May 20, 2021
Technical service bulletin
communication type
Electrical System
component
2021
model years
2
vehicle entries
Official summary
TSB: Some 2021 model year Sienna Hybrid LE vehicles may exhibit a condition of inoperative remote functions from the app or key fob, such as remote engine start or door lock/unlock functions. Registering either, or both, the ?Remote Engine Starter Registration Status? and ?Remote Door Lock Function? may be necessary using Techstream to address this condition. Follow the Repair Procedure in this bulletin to address this condition.
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.