Subaru WRX 2015–2018 — technical service bulletin
Bulletin Subarunet Annou · NHTSA communication 10171873 · issued Feb 7, 2020
Technical service bulletin
communication type
Engine and Engine Cooling
component
2015–2018
model years
4
vehicle entries
Official summary
Owner notification WUK-96 DIT exhaust pipe front (EPF) nut torque service campaign/voluntary emission recall.
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.