Toyota Sienna 2011–2016 — technical service bulletin
Bulletin ZH4_Dealer Daily · NHTSA communication 10132437 · issued Aug 3, 2017
Technical service bulletin
communication type
Latches/locks/linkages
component
2011–2016
model years
6
vehicle entries
Official summary
Dealer Daily Message: Extension of Warranty Coverage for the Sliding Door Front Lock Assemblies. The Dealer Letter for Warranty Enhancement Program ZH4 is now available on TIS.
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.