Toyota Tercel 1987–1990 — technical service bulletin
Bulletin T-CP-N04-0144-W_ · NHTSA communication 10163729 · issued Jul 30, 2019
Technical service bulletin
communication type
Exterior Lighting
component
1987–1990
model years
4
vehicle entries
Official summary
Dealer Letter: Toyota will initiate a Special Service Campaign to inform certain Tercel owners of the need to use only Koito brand replacement headlamp bulbs. The original equipment headlamp bulbs in these vehicles were all Koito brand. The use of any brand of bulb other than Koito can cause the headlamp to fail to meet all of the photometric requirements of the Federal Motor Vehicle Standard No. 108. Owners will be supplied with caution labels and asked to install them on the headlamp housings. Owners who have previously replaced headlamp bulbs will be asked to bring their vehicle to a dealer
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.