Subaru Legacy 2019–2021 — technical service bulletin
Bulletin 15-318-24R · NHTSA communication 11014843 · issued Feb 21, 2025
Technical service bulletin
communication type
Electrical System
component
2019–2021
model years
8
vehicle entries
Official summary
This bulletin announces the Warranty Extension for the Data Communication Module (DCM) up to 8 years (96 months) or 150,000 miles (whichever comes first) to address a dead battery resulting from excessive dark current draw caused by the DCM, due to internal memory corruption.
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.