Subaru WRX 2018–2021 — technical service bulletin
Bulletin 4-30-25 · NHTSA communication 11024851 · issued Oct 14, 2025
Technical service bulletin
communication type
Electrical System
component
2018–2021
model years
4
vehicle entries
Official summary
This bulletin announces the design change made to the steering gearbox harness. It will feature a connector holder, improving water sealing performance.
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.