Subaru Crosstrek 2017–2021 — technical service bulletin
Bulletin 09-77-21R · NHTSA communication 10201030 · issued Aug 19, 2021
Technical service bulletin
communication type
Electrical System
component
2017–2021
model years
9
vehicle entries
Official summary
This bulletin announces the availability of ECM reprograming files to correct a possible limited power and/or hesitation during acceleration at engine speeds of 1500-3500 rpm.
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.