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Service bulletin 09-74-21R

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id11027090
Published by NHTSA2026-01-06
Manufacturer's number09-74-21R
Manufacturer's date2025-12-12
NHTSA componentENGINE; FUEL/PROPULSION SYSTEM

NHTSA's summary

This bulletin provides updated parts information and a service procedure to follow for removing accumulated carbon deposits from fuel injectors and internal engine components (e.g. intake valves and / or manifold, and combustion chambers).

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Engine, Fuel system

Vehicles listed
SUBARU ASCENT2019, 2020, 2021, 2022, 2023, 2024, 2025
SUBARU CROSSTREK2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025
SUBARU FORESTER2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025
SUBARU IMPREZA2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025
SUBARU LEGACY2020, 2021, 2022, 2023, 2024, 2025
SUBARU OUTBACK2020, 2021, 2022, 2023, 2024, 2025
SUBARU WRX2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Recalls for the same vehicles and component
26V1060002026-02-23. FUEL SYSTEM, GASOLINE:STORAGE:TANK ASSEMBLY:FILLER PIPE AND CAP
20260772026-02-20. Fuel System
23V7230002023-10-26. ENGINE AND ENGINE COOLING
22V4730002022-07-01. ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM); ELECTRICAL SYSTEM:WIRING
20214662021-07-29. Fuel System
21V5870002021-07-29. FUEL SYSTEM, GASOLINE:DELIVERY:FUEL PUMP
21V2640002021-04-15. ELECTRICAL SYSTEM:SOFTWARE; ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM):SOFTWARE; ELECTRICAL SYSTEM:IGNITION; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:MANIFOLD/HEADER/MUFFLER/TAIL PIPE
20201622020-04-16. Fuel System
20V2180002020-04-16. FUEL SYSTEM, GASOLINE:DELIVERY:FUEL PUMP
20196042019-12-02. Engine

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
09-141-262026-10-05. Service bulletin. This Bulletin provides a diagnostic procedure for customer concerns about hesitation, reduced acceleration, or lack of power when driving uphill or under heavy engine load.
09-84-22R2026-10-05. Service bulletin. This bulletin announces Warranty Extension and design changes made to the front exhaust pipe and covers to address the concerns of some customers regarding an odor or a rattle-type noise/fluttering sound coming from the undercarriage, during acceleration. This is an revised version of the original bulletin.
09-98-22R2026-09-03. Service bulletin. This bulletin announces the availability of new reprograming files for the Engine Control Module (ECM) developed to remedy the following DTCs: P0016, P0017, P0018, P0019, P0014, P0024, P0128, P2109. If any of the DTCs listed above are found to be stored in the ECM, follow the procedures outlined in the bulletin. This is an revised version of the original bulletin.
02-196-26R2026-09-03. Service bulletin. This service bulletin outlines the diagnostic and repair procedure for white smoke emitted from the exhaust after startup. This is an revised version of the original bulletin.
07-231-262026-09-03. Service bulletin. This bulletin announces the service procedure for battery replacement on 2025-2026MY Impreza and Crosstrek.
09-123-24R2026-08-04. Service bulletin. This bulletin announces the design change made to the high-pressure fuel pump developed to prevent DTC P0087 (Fuel Rail/System Pressure – Too Low Bank 1). (This is an revised version of the original bulletin.)
09-81-21R2026-08-04. Service bulletin. This bulletin announces design changes made to the fuel injector in response to the DTCs listed. (This is an revised version of the original bulletin.)
07-242-262026-08-04. Service bulletin. This bulletin outlines a repair procedure to be performed if DTC B2781 is set in the steering lock control module.
09-140-262026-08-04. Service bulletin. This bulletin announces a design change to the filler cap thread shape to improve ease of installation of the fuel cap onto the filler neck.
02-193-24R2026-07-02. Service bulletin. This bulletin provides updated parts information and a service procedure to follow for removing accumulated carbon deposits from fuel injectors and internal engine components (e.g. intake valves and / or manifold, and combustion chambers). (This is an revised version of the original bulletin.)