2021 Subaru Forester Technical Service Bulletins

371 technical service bulletins (TSBs) are on record for the 2021 Subaru Forester. TSBs are notes manufacturers send to dealers about repair procedures for issues seen in the field. They are not recalls and do not by themselves mean a vehicle has a fault.

• 11016229Mar 27, 2025Visibility (wipers, defrost, mirrors). This announcement is in regard to the warranty extension initiated for windshields for the models listed.
• 11016233Mar 24, 2025Electrical system. In the interest of customer satisfaction, Subaru of America, Inc. (SOA) is extending the New Car Limited Warranty coverage for the CP1 & Gen 3.1 Head Unit used in the above listed models and model years to (8) eight years / 150,000 miles to cover certain qualifying repairs to the infotainment audio system.
• 11016224Mar 24, 2025Engine. The purpose of this bulletin is to advise of SOA’s revised Catalytic Converter Recycling Program shipping procedure.
• 11016218Mar 24, 2025Visibility (wipers, defrost, mirrors). In the interest of customer satisfaction, Subaru of America, Inc. (SOA) is extending the New Car Limited Warranty coverage for the Front Windshield used in the above listed models and model years from three (3) years / 36,000 miles to eight (8) years / 100,000 miles (whichever comes first). If a customer experiences windshield damage, inspect the damage as per the guidelines supplied in this bulletin to confirm if…
• 11016215Mar 24, 2025Engine. This Bulletin announces the Service Manual Correction for the diagnostic procedures to be followed when performing diagnostic repairs for diagnostic trouble codes (DTCs) P26A6 (Engine Coolant Bypass Valve “A” Position Sensor Circuit Low) and P26A7 (Engine Coolant Bypass Valve “A” Position Sensor Circuit High). Refer to the service procedures in this bulletin when performing diagnosis on DTCs P26A6 and P26A7. This…
• 11016210Mar 24, 2025Suspension. Due to incomplete repair instructions previously provided in the WQK-47 recall bulletin, the WQQ-52 recall will involve applying additional anti-corrosion material to the four-way (2-2 way) joint connector area of the brake line system on Forester, Impreza, WRX, and STI vehicles previously repaired under the WQK-47 (14V-311) brake line corrosion recall prior to the December 23, 2014 WQK-47 recall bulletin revision…
• 11016206Mar 18, 2025Electrical system. This Bulletin has been developed to outline the steps for gathering basic but essential information during diagnosis of Infotainment concerns.
• 11016205Mar 17, 2025Other or unknown. This bulletin contains additional information for recommended materials listed in the Service Manuals for individual models.
• 11016174Mar 6, 2025Body and structure. This Bulletin announces diagnostic procedures to be followed when working with a Power Rear Gate (PRG).
• 11016172Mar 6, 2025Electrical system. When attempting to complete the STARLINK Telematics subscription process, an Error Code 202 and / or 204 may occur preventing the process from completing successfully.
• 11014875Feb 24, 2025Fuel system. 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).
• 11014870Feb 18, 2025Electrical system. In the interest of customer satisfaction, Subaru of America, Inc. (SOA) is extending the New Car Limited Warranty coverage for the CP1 & Gen 3.1 Head Unit used in the listed models and model years to (8) eight years / 150,000 miles to cover certain qualifying repairs to the infotainment audio system.
• 11014865Feb 17, 2025Engine. 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).
• 11014848Feb 13, 2025Visibility (wipers, defrost, mirrors). In the interest of customer satisfaction, Subaru of America, Inc. (SOA) is extending the New Car Limited Warranty coverage for the Front Windshield used in the above listed models and model years from three (3) years / 36,000 miles to eight (8) years / 100,000 miles (whichever comes first).
• 11014854Feb 10, 2025Engine, Electrical system. This bulletin announces the availability of new reprogramming files for the Engine Control Module (ECM), to address concerns of the starter motor not operating.
• 11014852Feb 10, 2025Electrical system. "This Service Bulletin provides additional diagnostics to follow when addressing a Telematics-related DTC B2A16."
• 11013530Jan 31, 2025Other or unknown. This announcement is in regard to special service tool shipment will be shipped directly to the Subar retailers during February.
• 11013547Jan 29, 2025Electrical system. As part of Subaru's dedication to customer satisfaction, Subaru of America, Inc. (SOA) is announcing a Warranty Extension of the New Vehicle Limited Warranty coverage for the CP1 & Gen 3.1 Infotainment head units for the models listed.
• 11013535Jan 29, 2025Electrical system. This bulletin gives information on extended New Car Limited Warranty for CP1 and Gen 3.1 Head Units.
• 11013525Jan 28, 2025Electrical system. A head unit OTA will be available via cellular network for Mid and High Grade CP1.5 head units.
• 11013512Jan 17, 2025Electrical system, Fuel system. This bulletin announces the repair procedures to be followed when DTC P1449 (EVAP System Clog Detected) is detected by the Engine Control Module (ECM).
• 11013505Jan 14, 2025Electrical system. This bulletin announces availability of a new Genuine Subaru Alternative Replacement Battery introduced to satisfy current supply demands.
• 11013490Jan 6, 2025Electrical system, Fuel system. This bulletin the announces diagnostic procedures and availability of new Engine Control Module (ECM) reprogramming files to address DTC P2404 (Evap System Leak Detection Pump Sense Circuit Range/Performance) detection.
• 11012265Dec 19, 2024Fuel 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).
• 11012262Dec 19, 2024Engine, Electrical system. This bulletin the announces diagnostic procedures and availability of new Engine Control Module (ECM) reprogramming files to address DTC P2404 (Evap System Leak Detection Pump Sense Circuit Range/Performance) detection.
• 11012261Dec 17, 2024Visibility (wipers, defrost, mirrors). This announcement is in regard to settlement in a class action lawsuit for vehicles that will receive a limited warranty extension for original equipment Subaru windshields experiencing a qualifying crack.
• 11012260Dec 13, 2024Exterior lighting, Electrical system. This bulletin is for information purposes only.The bulletin adresses design changes of the headlamps and rear combination lamps, where moisture and or condensation may develop on the inside of the lamp lenses.
• 11010905Nov 21, 2024Body and structure, Electrical system. This bulletin announces the initialization service procedures to be followed when diagnosing and/or repairing Power Rear Gate (PRG) systems.
• 11010925Nov 14, 2024Electrical system. This annocement is to inform dealers to the Gen 3.1 Head Unit OTA will be available via Wi-Fi. The update will take place in multiple batches with the first beginneing November 15th and the last being Decemeber 3rd. This update is for approximatelt 714,000 VINs.
• 11010919Nov 8, 2024Electrical system. The following information addresses reprogramming file availability and a software update installation procedure to provide optimization to the new Harman Gen 3.1 Audio and Navigation head units utilized in the models as listed.
• 11009701Oct 31, 2024Other or unknown. This bulletin details an important regulation issued by the National Highway Traffic Safety Administration (NHTSA) which impacts the way some vehicles with accessories are sold. This regulation applies to any automobile retailer installing accessories on a vehicle prior to its first sale.
• 11009685Oct 1, 2024Other or unknown. This bulletin contains additional information for recommended materials listed in the Service Manuals for individual models.
• 11008284Sep 30, 2024Brakes. This bulletin announces availability of a Vehicle Dynamics Control Module (VDC) reprogramming file to address DTC B2809 & B2C22.
• 11008271Sep 30, 2024Engine. This bulletin announces the repair procedure developed to address cases of a knocking type sound emitting from the engine compartment.
• 11008283Sep 27, 2024Electrical system. This Service Information Bulletin announces the preferred practices to be used when handling vehicles equipped with Gen2 Telematics which are enrolled in the Subaru STARLINK® Security Plus Service featuring Stolen Vehicle Recovery Plus with Immobilizer.
• 11008282Sep 27, 2024Engine, Electrical system. This bulletin contains additional information for recommended materials listed in the Service Manuals for individual models.
• 11008281Sep 26, 2024Engine. This Service Information Bulletin announces the diagnostic procedures to be followed when diagnosing engine oil leakage on FA and FB type engines.
• 11008280Sep 26, 2024Electrical system. This Service Information bulletin is being released as guidance for proper testing and charging of vehicle batteries.
• 11008279Sep 26, 2024Electrical system. This bulletin contains illustrations of exchange components and their manufacturer as well as a description of the proper exchange procedure.
• 11008276Sep 26, 2024Electrical system. The CP1.5 RCs OTA is available for all mid and high grade CP1.5 head units.
• 11008267Sep 17, 2024Engine. This bulletin announces availability of the NEW genuine Subaru engine oil filter.
• 11008259Sep 4, 2024Suspension. This bulletin outlines the judgment criteria to be used when inspecting front transverse link bushings to reduce unnecessary bushing replacement.
• 11008258Sep 3, 2024Engine, Electrical system. This bulletin announces the availability of new oxygen sensors developed to address Diagnostic Trouble Codes (DTCs) detected by the Engine Control Module.
• 11006932Aug 15, 2024Electrical system. This Service Information Bulletin announces important diagnostic information to utilize when the Data Communication Module (DCM) is being tested as a dark current/standby current source.
• 11006935Aug 5, 2024Electrical system. This bulletin contains illustrations of exchange components and their manufacturer as well as a description of the proper exchange procedure for 2025MY vehicles.
• 11006934Aug 5, 2024Engine, Electrical system. The purpose of this bulletin is to provide replacement key and immobilizer information along with an overview of the Subaru Lock Information web-site.
• 11006931Aug 5, 2024Electrical system. This Bulletin provides additional diagnostics to follow when addressing a Telematics-related DTC B2A16.
• 11006930Aug 1, 2024Electrical system. This bulletin provides information on a new reprogramming procedure (FOTA) to optimize the Harman Gen 3.1 Audio and Navigation head units (H/U) utilized in the models as listed.
• 11005624Jul 24, 2024Transmission and drivetrain. This annoucement provides parts personnel information about remanufactured transmissions that will no longer be available.
• 11005617Jul 18, 2024Fuel 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).

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