Toyota Sienna 2004–2005 — technical service bulletin
Bulletin 0506 · NHTSA communication 10018857 · issued Jan 30, 2006
Technical service bulletin
communication type
Engine and Engine Cooling
component
2004–2005
model years
2
vehicle entries
Official summary
Warranty coverage enhancement - isolated reports from extreme cold climate areas that the radiator may crack at the base of one or more of the radiator tubes, resulting in coolant leakage - customer support program. *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.