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.

• 10201808Sep 24, 2021Equipment, Body and structure. This bulletin announces the design changes made to the A-pillar trim panels and their associated retaining (tether) clips.
• 10201806Sep 22, 2021Equipment, Electrical system. This bulletin provides important information regarding diagnosis and replacement (when applicable) of the STARLINK Telematics Data Communication Module (DCM) along with a new claim submission requirement.
• 10201805Sep 20, 2021Seats, Electrical system. This bulletin announces a design change made to the outer hinge cover on the driver’s 10-way adjustable power seats.
• 10201804Sep 20, 2021Equipment, Electrical 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.
• 10201802Sep 20, 2021Equipment, Electrical system. This bulletin announces availability of new Harman audio unit amplifier units with revised internal logic designed to optimize efficiency while addressing customer concerns.
• 10201793Sep 8, 2021Electrical system. This bulletin provides additional information for the diagnostic procedures concerning measurement of dark current (a.k.a. standby current).
• 10201052Aug 31, 2021Electrical system, Equipment. This bulletin provides additional information for the diagnostic procedures concerning measurement of dark current (standby current).
• 10201059Aug 30, 2021Fuel 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).
• 10201043Aug 23, 2021Equipment. This bulletin provides a description of current changes to Service Manuals available via the Subaru Technical Information System (STIS) web site.
• 10201021Aug 2, 2021Latches, locks and linkages, Equipment. This bulletin announces the service procedure for addressing possible water entry into the interior from the door(s) area.
• 10199935Jul 30, 2021Electrical system. This bulletin provides additional information for the diagnostic procedures concerning measurement of Dark Current (a.k.a. Standby Current).
• 10199966Jul 28, 2021Electrical 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.
• 10199961Jul 28, 2021Engine cooling, Electrical system. This bulletin announces the availability of NEW reprogramming files to correct DTC P0128.
• 10199954Jul 22, 2021Transmission and drivetrain. Diagnostic Information for Alleged Chain Slip Condition on TR580 / TR690 Transmissions.
• 10198682Jun 29, 2021Seats, Electrical system. This bulletin announces availability of a new reinforcement bracket for the seat position memory switch.
• 10198768Jun 28, 2021Engine cooling. 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).
• 10198758Jun 17, 2021Electrical system, Equipment. This bulletin contains additional information for recommended materials listed in the Service Manuals for individual models
• 10198774Jun 8, 2021Electrical 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.
• 10198749Jun 7, 2021Equipment, Engine cooling. This bulletin is to advise of SOA’s revised catalytic converter recycling program shipping procedure.
• 10198744Jun 7, 2021Electrical system, Latches, locks and linkages. This bulletin outlines changes in the service procedure for replacement of the Power Rear Gate control module.
• 10198741Jun 1, 2021Engine cooling. This bulletin outlines changes in the service procedure for engine oil pressure inspection.
• 10194830May 21, 2021Engine cooling. This bulletin provides updated parts information and a service procedure to follow for removing accumulated carbon deposits from fuel injectors and internal engine components.
• 10194826May 5, 2021Equipment. Description of current changes to Service Manuals available via the Subaru Technical Information System (STIS) web site.
• 10191664Apr 27, 2021Wheels, Electrical system. This bulletin announces a design change made to the TPMS valve assemblies.
• 10191591Apr 21, 2021Electrical system. This bulletin provides additional procedures and a detailed flow chart to use when diagnosing customer concerns regarding operation of the STARLINK RES feature.
• 10191568Apr 16, 2021Equipment. This bulletin contains illustrations of exchange components and their manufacturer as well as a description of the proper exchange procedure.
• 10191586Apr 9, 2021Equipment. This bulletin announces availability of new audio unit amplifier units with revised internal logic designed to optimize efficiency.
• 10189665Mar 10, 2021Seats, Electrical system. This bulletin provides additional diagnostics and new part availability information for the Seat Memory Control Module.
• 10189663Mar 4, 2021Latches, locks and linkages. This bulletin announces a design change made to the front hood lock (latch) assembly.
• 10188160Feb 23, 2021Equipment, Transmission and drivetrain. This Service Information Bulletin provides updated diagnostic procedures to follow and a brief questionnaire to complete when diagnosing an alleged Chain Slip condition on the TR580 and TR690 model CVT transmissions.
• 10188185Feb 17, 2021Electrical system, Equipment. This bulletin announces a change made to the MFD software to keep the affected units listed below compliant with Apple® CarPlay® certification.
• 10188183Feb 17, 2021Engine, Equipment. This bulletin announces the upcoming issuance to all retailers of an essential tool update kit for the Engine Support Assembly Kit #J-50135-A.
• 10188170Feb 10, 2021Equipment, Electrical 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.
• 10188168Feb 5, 2021Electrical system, Equipment. This bulletin announces availability of new Harman audio unit amplifier units with revised internal logic designed to optimize efficiency.
• 10187315Feb 1, 2021Equipment. To help reduce confusion and increase technician efficiency, Subaru of America, Inc. (SOA) has developed the following cross reference list to help locate the appropriate Special Service Tool.
• 10186438Jan 28, 2021Electrical system. This bulletin announces availability of a new variable displacement type A/C compressor designed to address a small number of customer concerns regarding an excessive sound heard when the system is OFF.
• 10186416Jan 18, 2021Transmission and drivetrain. This bulletin provides updated diagnostic procedures to follow and a brief questionnaire to complete when diagnosing an alleged chain slip condition on the TR580 and TR690 model CVT transmissions.
• 10186385Jan 18, 2021Equipment, Seats. This bulletin announces a design change made to the outer hinge cover on the driver’s 10-way adjustable power seats.
• 10186426Jan 14, 2021Electrical system. This bulletin provides insight in response to both customer and retailer feedback resulting from the use of OBD-II port connected devices.
• 10186391Jan 14, 2021Electrical system. This bulletin provides information related to error code 202 and/or 204 generated during the Gen 2 Telematics subscription process. This bulletin is applicable to all 2019-2021MY vehicles equipped with a Gen. 2 Telematics System.
• 10186389Jan 14, 2021Equipment, Electrical system. This bulletin provides important information regarding diagnosis and replacement of the STARLINK Telematics Data Communication Module (DCM). This update is applicable to all models equipped with a STARLINK Telematics System.
• 10186380Jan 14, 2021Electrical system, Equipment. This bulletin provides an overview and basic instructions for use of the “Destination to Vehicle” feature of the Gen 2 Telematics system.
• 10186379Jan 14, 2021Electrical system. This bulletin provides helpful procedures and best practices to utilize when customers present with concerns relating to the operation of their Gen 2 Telematics system equipped Subaru.
• 10186378Jan 14, 2021Electrical system, Equipment. This bulletin provides information related to the telematics system's Automatic Collision Notification (ACN) and Advanced Automatic Collision Notification (AACN) feature operation, diagnostic tips, and best practices.
• 10186377Jan 14, 2021Electrical system. This bulletin has been developed for use as a quick reference tool to aid in diagnosing operational concerns of the Gen 2 Telematics system's remote access features.
• 10186355Jan 7, 2021Electrical system, Equipment. Reprogramming File Availability for Optimization of Harman Gen 3.1 and Gen 3.1α Audio and Navigation Head Units.
• 10186348Jan 4, 2021Equipment, Electrical system. The purpose of this bulletin is to provide replacement key and immobilizer information.
• 10185094Dec 31, 2020Electrical system. This Service Information Bulletin provides a remedy procedure to use when a communication error message appears during Subaru Select Monitor (SSM) diagnosis of the DMS.
• 10185089Dec 29, 2020Equipment, Transmission and drivetrain. This Service Information Bulletin provides updated diagnostic procedures to follow when diagnosing an alleged Chain Slip condition on the TR580 and TR690 model CVT transmissions.
• 10185088Dec 21, 2020Electrical system, Equipment. 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.

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