Subaru Legacy 2019–2021 — technical service bulletin
Bulletin 15-318-24R · NHTSA communication 10253955 · issued Apr 23, 2024
Technical service bulletin
communication type
Electrical System
component
2019–2021
model years
5
vehicle entries
Official summary
This bulletin announces the availability of the DCM Bypass Box designed to be used as an alternative replacement part for Data Communication Module (DCM) in vehicles with no active STARLINK subscription. There will be a warranty extension for the DCM up to 8 years (96 months) or 150,000 miles.
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.