Subaru Legacy 2020–2021 — technical service bulletin
Bulletin 15-277-21 · NHTSA communication 10188197 · issued Feb 25, 2021
Technical service bulletin
communication type
Electrical System
component
2020–2021
model years
4
vehicle entries
Official summary
This bulletin provides the procedure which must be followed to properly register the Map Update Request Code assigned to the exchange CCU with the Subaru Map Update web portal.
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.