Lexus RX300 1999 — technical service bulletin
Bulletin XL3 · NHTSA communication 615966 · issued Jan 1, 1999
Technical service bulletin
communication type
Electrical System
component
1999
model years
1
vehicle entries
Official summary
On certain rx models, if the headlight swtich is set to the auto position, the headlights and taillights may not automatically illuminate in low ambient light. Under this condition, only the daytime running lights (using high beam at reduced intensity) are illuminated. The xl-2 special service campaign handbook involves replacing the body electronic control unit (ecu) with an improved one. *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.