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.

• 10222346Sep 13, 2022Electronic stability control, Electrical system, Equipment. This bulletin announces the availability of new Vehicle Dynamics Control (VDC) reprogramming files.
• 10222338Sep 6, 2022Electrical system, Equipment. This Service Bulletin is to inform you of the diagnosis procedure of the Harman Infotainment System when DTC B2255 is detected.
• 10219482Aug 29, 2022Engine cooling, Electrical system. This Bulletin provides the diagnostic procedure for the STARLINK® Remote Engine Start (RES). All Gen2 Telematic equipped models.
• 10219496Aug 26, 2022Engine 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).
• 10219499Aug 23, 2022Electrical system, Latches, locks and linkages. This Service Information Bulletin provides additional information for the diagnostic procedures concerning measurement of Dark Current (a.k.a. Standby Current).
• 10219492Aug 23, 2022Equipment. This bulletin contains additional information for recommended materials listed in the Service Manuals for individual models.
• 10219491Aug 23, 2022Electrical system, Equipment. This bulletin contains illustrations of exchange components and their manufacturer as well as a description of the proper exchange procedure.
• 10219476Aug 12, 2022Equipment. Special Edition, 2012 current model subaru evaporative diagnostics and smoke testing.
• 10219474Aug 9, 2022Electrical system, Equipment. This Bulletin provides additional procedures and a detailed flow chart to use when diagnosing customer concerns regarding operation of the STARLINK RES feature.
• 10219469Aug 2, 2022Transmission and drivetrain. The bulletin announces the design change made the propeller shaft to address the small number of customer concerns regarding a growling-type sound being heard from under the vehicle when driving.
• 10216984Jul 12, 2022Equipment, Transmission 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 used in the models listed.
• 10216981Jul 11, 2022Electrical system, Equipment, Other or unknown. This 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.
• 10216980Jul 11, 2022Equipment, Engine cooling. The purpose of this Bulletin is to provide procedures for the diagnosis and repair of oil seepage which may be coming from the timing chain cover, front camshaft cap, camshaft carrier and / or upper oil pan.
• 10216969Jul 5, 2022Equipment, Suspension. This bulletin announces a design change made to the front stabilizer bushings.
• 10215427Jun 27, 2022Equipment, 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 utilized in the models as listed.
• 10215420Jun 27, 2022Electrical system, Equipment. This Service Bulletin is to inform you of the diagnosis procedure of the Harman Infotainment System when DTC B2255 is detected.
• 10215405Jun 14, 2022Engine cooling, Electrical system. This bulletin announces availability of new reprograming files for the Engine Control Module (ECM).
• 10215402Jun 14, 2022Equipment, Latches, locks and linkages. This bulletin announces a design change made to the rear gate stay assemblies.
• 10213187May 17, 2022Electrical 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.
• 10213179May 12, 2022Electrical system, Engine cooling. This bulletin announces availability of new reprograming files for the Engine Control Module (ECM).
• 10213174May 9, 2022Electrical system, Equipment. This bulletin announces the Service Manual correction for the diagnostic trouble tree for DTC B281C.
• 10210838Apr 27, 2022Electrical system, Equipment, Back-over prevention (rear camera). This bulletin announces the availability of new reprogramming files for the Subaru Rear Vehicle Detection (SRVD) system.
• 10210835Apr 26, 2022Equipment. This bulletin announces the design change made to the side cowl panels.
• 10210812Apr 6, 2022Equipment. The purpose of this bulletin is to provide a description of current changes to Service Manuals available via the Subaru Technical Information System (STIS) web site.
• 10209915Mar 18, 2022Electrical system. This bulletin has been developed to outline the steps for gathering basic essential information during diagnosis and repair of the Infotainment concerns. (Applicable to all models with Harman or Denso CP1 Infotainment).
• 10209930Mar 15, 2022Equipment, Electrical system, Back-over prevention (rear camera). This bulletin announces the availability of new reprogramming files for the Subaru Rear Vehicle Detection (SRVD) system.
• 10209913Mar 2, 2022Electrical system. This bulletin announces availability of new Harman audio unit amplifier units with revised internal logic designed to optimize efficiency while addressing customer concerns.
• 10208689Feb 28, 2022Equipment, Electrical system. This bulletin provides helpful tips to better utilize the Subaru Select Monitor 4.
• 10208664Feb 28, 2022Engine cooling. This bulletin announces availability of a new thermo control valve assembly.
• 10208661Feb 23, 2022Transmission and drivetrain. WRK-21 CVT Chain Guide Breakage Recall - Customer communications and rental.
• 10208699Feb 11, 2022Visibility (wipers, defrost, mirrors). This bulletin announces the design change to the front window channel running channel seals.
• 10208688Feb 8, 2022Transmission 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.
• 10207215Jan 14, 2022Transmission and drivetrain. This bulletin provides a repair procedure for R152 type rear differentials.
• 10207185Jan 13, 2022Electrical system, Equipment. This bulletin announces availability of new Harman audio unit amplifier units with revised internal logic designed to optimize efficiency.
• 10207174Jan 10, 2022Transmission and drivetrain, Equipment. 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.
• 10207168Jan 3, 2022Electrical system, Equipment. This bulletin contains illustrations of exchange components and their manufacturer as well as a description of the proper exchange procedure.
• 10207172Jan 2, 2022Engine cooling, Equipment. This Bulletin announces design changes to the engine oil and CVT fluid drain plugs.
• 10205930Dec 29, 2021Electrical system. This bulletin provides additional diagnostics to follow when addressing a Telematics-related DTC B2A16.
• 10205927Dec 21, 2021Suspension. This bulletin announces a design change made to the front stabilizer bushings.
• 10205924Dec 15, 2021Equipment, Electrical system. This bulletin announces availability of new Harman audio unit amplifier units with revised internal logic designed to optimize efficiency.
• 10205915Dec 8, 2021Electrical system. Map Data Update Procedure for Harman Gen 3.1 Navigation Equipped Head Units.
• 10205913Dec 6, 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.
• 10205911Dec 6, 2021Electrical system, Equipment. This bulletin announces the design change of the expansion valve.
• 10203901Nov 15, 2021Electrical system, Equipment. This bulletin announces a design change made to the evaporator core insulation.
• 10203864Nov 2, 2021Equipment, Electrical system. This bulletin provides insight in response to both customer and retailer feedback resulting from the use of OBD-II port connected devices.
• 10202841Oct 28, 2021Electrical system. This bulletin provides additional diagnostics to follow when addressing a Telematics-related DTC B2A16.
• 10202828Oct 15, 2021Engine cooling, Equipment. This bulletin provides a new flow chart and additional diagnostic tools to assist technicians with troubleshooting DTC P0841- SECONDARY OIL PRESSURE SENSOR PERFORMANCE.
• 10202811Oct 8, 2021Electrical system. This bulletin announces the availability of diagnostic information regarding accessory remote engine start systems.
• 10202810Oct 7, 2021Engine cooling, Equipment. This bulletin announces an additional service procedure for timing chain and / or cam sprocket replacement on FA and FB type engines.
• 10201810Sep 24, 2021Engine cooling, Equipment, Fuel 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).

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