Subaru is making only minor changes to the 2017 WRX and STi:
All models receive new tricot headliners.
Previously only offered on premium trim and higher, the base WRX STI offers auto on/off headlights in auto mode position with windshield wiper operation.
Previously only available on Limited model, Blind Spot Detection and Rear Cross Traffic Alert are now available on base STi.
Reverse automatic braking is now standard on WRX Limited with EyeSight.