Subaru Ascent 2019–2020 — technical service bulletin
Bulletin 15-255-19R · NHTSA communication 10179429 · issued Aug 31, 2020
Technical service bulletin
communication type
Equipment
component
2019–2020
model years
16
vehicle entries
Official summary
Map Data Update Procedure for Harman Gen 3.1 Navigation Equipped Head Unts (H/U).
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.