Subaru Ascent 2023–2024 — technical service bulletin
Bulletin 15-311-23R · NHTSA communication 10253962 · issued Apr 12, 2024
Technical service bulletin
communication type
Electrical System
component
2023–2024
model years
8
vehicle entries
Official summary
This bulletin provides instruction for use of a new reprogramming procedure to optimize the Denso Gen 4.5 Audio and Navigation system utilized in the models listed.
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.