Subaru Ascent 2017–2021 — technical service bulletin
Bulletin Subarunet Announ · NHTSA communication 10188191 · issued Feb 22, 2021
Technical service bulletin
communication type
Electrical System
component
2017–2021
model years
8
vehicle entries
Official summary
SOA821B600 Battery Supersession
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.