Subaru Ascent 2023–2024 — technical service bulletin
Bulletin 15-305-22R · NHTSA communication 10251104 · issued Feb 26, 2024
Technical service bulletin
communication type
Electrical System
component
2023–2024
model years
9
vehicle entries
Official summary
This bulletin announces updated reprogramming files available to optimize the new Gen 4.5 Denso CP1.5 Audio and Navigation head units.
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.