Toyota Sienna 2014–2018 — technical service bulletin
Bulletin T-TT-0463-17 · NHTSA communication 10133639 · issued Nov 16, 2017
Technical service bulletin
communication type
Equipment
component
2014–2018
model years
8
vehicle entries
Official summary
T-TT: Some vehicles may exhibit an abnormal HVAC blower motor noise.
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.