Toyota 4 Runner 1997 — technical service bulletin
Bulletin 603980603 · NHTSA communication 601331 · issued Jun 3, 1998
Technical service bulletin
communication type
Wheels
component
1997
model years
2
vehicle entries
Official summary
A griive gas been added to both the inner and outer wheel flanges to improve aluminum wheel weight retention.
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.