2021 Subaru Legacy Technical Service Bulletins

460 technical service bulletins (TSBs) are on record for the 2021 Subaru Legacy. 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.

• 10231303Jan 12, 2023Transmission and drivetrain. Subaru of America, Inc. (Subaru) has initiated this safety and emissions Recall for certain 2019 - 2020 model year Ascent vehicles, 2020-2021 model year turbo Legacy vehicles, and 2020-2021 model year turbo Outback vehicles in which the Continuously Variable Transmission (CVT) chain may slip and/or break.
• 10231299Jan 12, 2023Transmission 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 used in the models listed.
• 10231293Jan 12, 2023Engine cooling. This service bulletin provides a temporary repair procedure to address vibrations and/or judder concerns experienced on turns during acceleration.
• 10228796Dec 30, 2022Electrical system, Equipment. This Service Information Bulletin outlines a new required procedure to follow when performing immobilizer-related repairs.
• 10228791Dec 29, 2022Transmission and drivetrain. "Subaru of America, Inc. (Subaru) has initiated this safety and emissions Recall for certain 2019 - 2020 model year Ascent vehicles, 2020-2021 model year turbo Legacy vehicles, and 2020-2021 model year turbo Outback vehicles in which the Continuously Variable Transmission (CVT) chain may slip and/or break."
• 10228777Dec 3, 2022Electrical system. This bulletin announces a new Genuine Subaru Replacement battery for use in applications where the current SOA821B700 battery is specified.
• 10226858Nov 30, 2022Electrical system. This bulletin announces a new Genuine Subaru Replacement battery for use in applications where the current SOA821B700 battery is specified.
• 10226904Nov 17, 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 used in the models listed.
• 10226863Nov 17, 2022Electrical system, Equipment. This bulletin announces availability of new Harman audio unit amplifier units with revised internal logic designed to optimize efficiency while addressin customer concerns.
• 10226855Nov 16, 2022Transmission and drivetrain. This communication announces a new procedure for retailers to follow in the event their WRK-21 videoscope requires service or replacement.
• 10226841Nov 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.
• 10225775Oct 31, 2022Equipment, Electrical system. The following information announces reprogramming file availability and provides a software update installation procedure to optimize the new Gen 4 Denso CP1 Audio and Navigation head units utilized in the models listed.
• 10225731Oct 31, 2022Engine cooling, Transmission and drivetrain. Subaru of America, Inc. (Subaru) has initiated this safety and emissions Recall for certain 2019 -2020 model year Ascent vehicles, 2020-2021 model year turbo Legacy vehicles, and 2020-2021 model year turbo Outback vehicles in which the Continuously Variable Transmission (CVT) chain may slip and/or break.
• 10225772Oct 24, 2022Transmission and drivetrain. UPDATE: Subaru Safety & Emissions Recall: WRK-21 – CVT Chain Guide Breakage.
• 10225766Oct 18, 2022Electrical system, Equipment. This Bulletin provides additional diagnostics to follow when addressing a Telematics-related DTC B2A16.
• 10225762Oct 12, 2022Electrical system. This Bulletin outlines a new required procedure to follow when performing immobilizer-related repairs.
• 10225759Oct 12, 2022Equipment, Electrical system. A Firmware Over the Air (FOTA) software update is available for our customers with a Gen 4 head unit.
• 10225744Oct 3, 2022Equipment, Electrical system. This bulletin is being released as guidance for proper testing and charging of vehicle batteries.
• 10222371Sep 30, 2022Transmission and drivetrain. Subaru of America, Inc. (Subaru) has initiated this safety and emissions Recall for certain 2019 - 2020 model year Ascent vehicles, 2020-2021 model year turbo Legacy vehicles, and 2020-2021 model year turbo Outback vehicles in which the Continuously Variable Transmission (CVT) chain may slip and/or break.
• 10222367Sep 27, 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.
• 10222361Sep 26, 2022Electronic stability control, Electrical system. This bulletin announces availability of new Vehicle Dynamics Control (VDC) reprograming files.
• 10222348Sep 14, 2022Equipment, Engine cooling. This bulletin announces availability of a new thermo control valve assembly.
• 10222342Sep 14, 2022Transmission and drivetrain. This service bulletin provides a temporary repair procedure to address vibrations and/or judder concerns experienced on turns during acceleration.
• 10219497Aug 30, 2022Equipment, Electrical system. A Firmware Over the Air (FOTA) software update is available for our customers with a Gen 4 head unit.
• 10219482Aug 29, 2022Electrical system, Engine cooling. 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).
• 10219473Aug 26, 2022Transmission and drivetrain. Subaru of America, Inc. (Subaru) has initiated this safety and emissions Recall for certain 2019 - 2020 model year Ascent vehicles, 2020-2021 model year turbo Legacy vehicles, and 2020-2021 model year turbo Outback vehicles in which the Continuously Variable Transmission (CVT) chain may slip and/or break.
• 10219492Aug 23, 2022Equipment. This bulletin contains additional information for recommended materials listed in the Service Manuals for individual models.
• 10219491Aug 23, 2022Equipment, Electrical system. 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, 2022Equipment, Electrical system. This Bulletin provides additional procedures and a detailed flow chart to use when diagnosing customer concerns regarding operation of the STARLINK RES feature.
• 10219470Aug 2, 2022Electrical system. This bulletin provides instruction for use of a new reprogramming procedure to optimize the Denso Gen 4 Audio and Navigation system utilized in the models listed. (Firmware Over-The Air) FOTA.
• 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.
• 10216974Jul 8, 2022Equipment, Transmission and drivetrain. "Subaru of America, Inc. (Subaru) is initiating this safety and emissions recall for certain 2020-2021 model year turbo Legacy vehicles and 2020-2021 model year turbo Outback vehicles in which the Continuously Variable Transmission (CVT) chain may slip and/or break. (New recall WRK22 will cover 182 pre-production vehicles not already included in the WRK21 recall initiated in December 2021. These additional 182…
• 10215437Jun 30, 2022Equipment, Electrical system. This Service Information Bulletin outlines a new required procedure to follow when performing immobilizer-related repairs.
• 10215432Jun 29, 2022Engine cooling, Electrical system. This bulletin announces availability of new reprograming files for the Engine Control Module (ECM).
• 10215424Jun 27, 2022Equipment, Electrical system. This Service Information Bulletin is to inform you of the diagnosis procedure of the Harman Infotainment System when DTC B2256 is detected.
• 10213182May 13, 2022Electrical system. This bulletin addresses the rare cases of activation of touch screen buttons without touch. (11.6" Display Screen Only)
• 10213181May 13, 2022Electrical system. This bulletin addresses isolated customer concerns regarding the pictured CP1 BASEModel Center Information Display (CID) LOWER 7-inchdisplay screen flashing, not responding to touch inputs and / or shutting off intermittently.
• 10213178May 12, 2022Equipment, Electrical system. This bulletin addresses the rare cases of activation of touch screen buttons without touch. (Dual 7" Display Screen Only)
• 10213174May 9, 2022Electrical system, Equipment. This bulletin announces the Service Manual correction for the diagnostic trouble tree for DTC B281C.
• 10213170May 2, 2022Equipment, Electrical system. The following information announces reprogramming file availability and provides a software update installation procedure to optimize the new Gen 4 Denso CP1 Audio and Navigation head units.
• 10210827Apr 26, 2022Equipment, Engine cooling, Transmission and drivetrain. This service bulletin provides a temporary repair procedure to address vibrations and/or judder concerns experienced on turns during acceleration.
• 10210833Apr 22, 2022Equipment, Electrical system. The following information announces reprogramming file availability and provides a software update installation procedure to optimize the new Gen 4 Denso CP1 Audio and Navigation head units.
• 10210832Apr 22, 2022Equipment, Electrical system. The following information announces reprogramming file availability and provides a software update installation procedure to optimize the new Gen 4 Denso CP1 Audio and Navigation head units.
• 10210831Apr 22, 2022Electrical system, Engine cooling. This bulletin announces availability of new reprograming files for the Engine Control Module (ECM).
• 10210820Apr 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.
• 10209937Mar 29, 2022Electrical system, Equipment, Engine cooling. This bulletin announces the proper diagnostic procedures regarding oil leakage from the oil level switch area.
• 10209935Mar 22, 2022Electrical system. This bulletin outlines a new required procedure to follow when performing immobilizer-related repairs on the 2020-2022 Subaru vehicles.

← All problems reported for the 2021 Subaru Legacy