Subaru Legacy 2017 — technical service bulletin
Bulletin 07-121-17 · NHTSA communication 10138776 · issued Dec 19, 2017
Technical service bulletin
communication type
Exterior Lighting
component
2017
model years
2
vehicle entries
Official summary
MODELS WITH EYESIGHT ONLY. This bulletin provides a repair procedure to address DTC B2902 which may be stored erroneously due to a specification mismatch. This bulletin applies to a very limited number of early-production 2017 model year vehicles without the auto headlamp leveling (AHL) feature only. Having the incorrect control module installed has absolutely NO effect on normal headlamp system operation and does not cause any warning lamp(s) to illuminate. The repair involves replacing the headlamp control module.
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.