Subaru Ascent 2019–2021 — technical service bulletin
Bulletin SubaruNet Announ · NHTSA communication 10202806 · issued Oct 1, 2021
Technical service bulletin
communication type
Electrical System
component
2019–2021
model years
3
vehicle entries
Official summary
Effective today (October 1, 2021), the recommended replacement battery for the 19-21 MY Ascent models is changing from the SOA821B200 Flooded Battery to the SOA821B600 Enhanced Flooded Battery (EFB).
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.