Toyota Sienna 2004 — technical service bulletin
Bulletin 00504 · NHTSA communication 10010031 · issued Sep 20, 2004
Technical service bulletin
communication type
Seats
component
2004
model years
1
vehicle entries
Official summary
Seat heater only works on high. *tt
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.