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Service bulletins for the 2021 Subaru Ascent

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.

384 on file from NHTSA, as of 2026-10-19.

By type

By component

By trouble code

Only bulletins with component: Engine are shown. Show all

Bulletins, newest first
09-141-262026-10-05. Service bulletin. ENGINE; ELECTRICAL SYSTEM. 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.
09-98-22R2026-09-03. Service bulletin. ENGINE; ELECTRICAL SYSTEM. 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. ENGINE. 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.
02-193-24R2026-07-02. Service bulletin. ENGINE. 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.)
09-74-21R2026-07-02. Service bulletin. ENGINE; FUEL/PROPULSION SYSTEM. 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.)
02-196-262026-07-02. Service bulletin. ENGINE. This bulletin outlines the diagnostic and repair procedure for white smoke emitted from the exhaust after startup.
09-130-25R2026-07-02. Service bulletin. ENGINE. This bulletin announces the design change made to the exhaust manifold flange nut material that has been changed from stainless steel to medium carbon steel. This change also necessitates a revised tightening torque specification. (This is an revised version of the original bulletin.)
02-193-24R2026-06-01. Service bulletin. ENGINE. 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).
18-230-262026-06-01. Service bulletin. ENGINE. This bulletin announces the diagnostic procedures to be used when DTCs B1571(REFERENCE CODE INCOMPATIBILITY IMMOBILIZER CM TO ECM) and B1572(IMM CIRCUIT EXCEPT ANTENNA CIRCUIT) are detected by Keyless Access with Push Button Start(KACM).
15-300-22R2026-02-02. Service bulletin. ELECTRICAL SYSTEM; ENGINE. This Bulletin provides the diagnostic procedure for the STARLINK® Remote Engine Start (RES).
09-74-21R2026-01-06. Service bulletin. ENGINE; FUEL/PROPULSION SYSTEM. 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).
18-226-25R2026-01-06. Service bulletin. ELECTRICAL SYSTEM; ENGINE. This Service Information Bulletin provides the Service Manual Correction to the diagnostic procedure for DTC B2A16 (Immobilizer Key Collation Diagnosis).
18-228-25R2026-01-06. Service bulletin. ENGINE; FUEL/PROPULSION SYSTEM; ELECTRICAL SYSTEM. This bulletin announces the diagnostic procedures to be used when DTCs P2096 (POST CATALYST FUEL TRIM SYSTEM TOO LEAN BANK 1) and P2097 (POST CATALYST FUEL TRIM SYSTEM TOO RICH BANK 1) are detected by the Engine Control Module (ECM).
18-228-252025-12-01. Service bulletin. ENGINE; ELECTRICAL SYSTEM. This bulletin announces the diagnostic procedures to be used when DTCs P2096 (POST CATALYST FUEL TRIM SYSTEM TOO LEAN BANK 1) and P2097 (POST CATALYST FUEL TRIM SYSTEM TOO RICH BANK 1) are detected by the Engine Control Module (ECM).
15-319-24R2025-11-04. Service bulletin. ELECTRICAL SYSTEM; ENGINE. This bulletin announces the diagnostic procedures to be followed when encountering cases of the Remote Engine Start (RES) system being the only non-functioning feature with telematics.
07-235-252025-10-02. Service bulletin. FORWARD COLLISION AVOIDANCE: WARNINGS; ENGINE. In the interest of customer satisfaction Subaru of America, Inc. (SOA) is extending the New Car Limited Warranty coverage in the models listed. The extension will address instances of “phantom braking” or the EyeSight/RAB systems causing unnecessary stoppage/slowing of the vehicle.
02-193-24R2025-09-02. Service bulletin. ENGINE. 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).
Subaru Service Technical2025-09-02. Other. ENGINE; ELECTRICAL SYSTEM; POWER TRAIN. Subaru Service Technical Support Newsletter special edition.
02-193-24R2025-06-03. Service bulletin. FUEL/PROPULSION SYSTEM; ENGINE. 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).
02-192-24R2025-05-01. Service bulletin. ENGINE. This Bulletin announces the diagnostic procedures to be followed when diagnosing engine oil leakage on FA and FB type engines.
02-193-24R2025-05-01. Service bulletin. ENGINE; FUEL/PROPULSION SYSTEM. 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).
09-51-08R2025-04-01. Service bulletin. ENGINE. The purpose of this bulletin is to advise of SOA’s revised Catalytic Converter Recycling Program shipping procedure.
02-193-24R2025-03-04. Service bulletin. ENGINE. 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).
09-130-25R2025-03-04. Service bulletin. ENGINE. This bulletin announces the design change made to the exhaust manifold flange nuts. The material has been changed from a medium carbon steel to stainless steel.
09-130-25R2025-03-04. Service bulletin. ENGINE. This bulletin announces the design change made to the exhaust manifold flange nuts. The material has been changed from a medium carbon steel to stainless steel.

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.