Toyota 4 Runner 1996–1998 — technical service bulletin
Bulletin AC00299 · NHTSA communication 604644 · issued Feb 26, 1999
Technical service bulletin
communication type
Visibility
component
1996–1998
model years
6
vehicle entries
Official summary
Production changes to the cowl top louver and heater unit have been made to improve resistance to snow entry into the heater unit and improve durability of air mix door on vehicles within certain vin ranges. *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.