Jeep Grand Cherokee 1999 — technical service bulletin
Bulletin 840 · NHTSA communication 6089743 · issued Sep 1, 1999
Technical service bulletin
communication type
Engine and Engine Cooling
component
1999
model years
1
vehicle entries
Official summary
Oxygen sensor wiring which may contact the mini-catalyst. *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.