2021 Subaru WRX Technical Service Bulletins

215 technical service bulletins (TSBs) are on record for the 2021 Subaru WRX. 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.

• 11008259Sep 4, 2024Suspension. This bulletin outlines the judgment criteria to be used when inspecting front transverse link bushings to reduce unnecessary bushing replacement.
• 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).
• 11005615Jul 18, 2024Electrical system. This announcement provides information for retailers to install the latest infotainment system software for Denso CP 1.5.
• 11005614Jul 17, 2024Electrical system. This bulletin announces important diagnostic information to utilize when testing the Data Communication Module (DCM) as a dark current/standby current source. All models equipped with Telematics except Solterra.
• 11005609Jul 15, 2024Electrical system, Air bags. This announcement provides information on Takata Recall Escalated Towing Program.
• 11005608Jul 11, 2024Engine. This thermo control valve video contains information on the replacement of thermo control valve.
• 11005605Jul 9, 2024Electrical system. This bulletin 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.
• 11005599Jul 9, 2024Other or unknown. This Bulletin provides SOA paint codes to help eliminate possible confusion for 2025 MY vehicles.
• 11005595Jul 8, 2024Other or unknown. This bulletin contains additional information for recommended materials listed in the Service Manuals for individual models.
• 11005593Jul 8, 2024Suspension. This Bulletin provides guidance for diagnosing a leaking front or rear suspension strut.
• 11002730Jun 28, 2024Electrical system. This information announces reprograming file availability for Gen 4.5 Denso CP1.5 Audio and Navigation systems. Inprovement for CarPlay concerns with hands-free calls when the receiving party is not able to hear the caller.
• 11002725Jun 25, 2024Brakes. This bulletin provides diagnosis and procedure information to be applied when diagnosing potential fluid leaks on front and rear brake calipers. This information has been developed to reduce unnecessary brake caliper replacement.
• 11000830May 14, 2024Electrical 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.
• 10252542Mar 27, 2024Equipment, Electrical 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.
• 10252541Mar 26, 2024Equipment, Electrical system. This bulletin addresses the 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.
• 10252492Mar 19, 2024Equipment. 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.
• 10252491Mar 19, 2024Equipment, Electrical system. This bulletin addresses an error code 202 and or 204 when attempting to complete the STARLINK telematics subsription process.
• 10252465Mar 19, 2024Equipment, Electrical system. This bulletin announces the availability of the DCM Bypass Box designed to be used as an alternative replacement part for Data Communication Module (DCM) in vehicles with no active STARLINK subscription.
• 10251102Feb 23, 2024Electrical system, Equipment. This bulletin announces the availability of a Data Communication Module (DCM) bypass box. This has been designed as an alternative replacement part for vehicles without active STARLINK subscriptions. The bypass box will support audio functions for the infotainment system.
• 10249605Jan 9, 2024Equipment, Electrical 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.
• 10248193Dec 8, 2023Electrical 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 utilized in the models as listed.
• 10246083Nov 7, 2023Equipment, Engine cooling. This Service Information Bulletin announces diagnostic service procedures to be followed when DTC P0420 (Catalyst System Efficiency Below Threshold Bank 1) is detected by the Engine Control Module (ECM).
• 10244903Oct 26, 2023Equipment, Electrical system, Other or unknown. This Bulletin provides helpful procedures and best practices to utilize when customers present with concerns relating to the operation of their Gen 2/Gen 3 Telematics system equipped Subaru.
• 10244889Oct 2, 2023Equipment, 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
• 10243372Sep 11, 2023Forward collision avoidance, Equipment, Electrical system. This Bulletin announces additional information regarding error codes 1403- 1407 encountered when attempting an adjustment/calibration of the EyeSight® system after body repair procedures have been performed.
• 10241846Aug 31, 2023Electrical system, Equipment, Engine cooling. This Service Information Bulletin announces additional diagnostic procedures and a detailed flow chart to be used when diagnosing customer concerns regarding the operation of the STARLINK Remote Engine Start (RES) feature.
• 10241801Aug 1, 2023Equipment, Latches, locks and linkages, 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.
• 10240123Jul 31, 2023Equipment, Electrical system. This Service Information Bulletin has been developed to outline the steps for gathering basic but essential information during diagnosis of Infotainment concerns.
• 10240113Jul 13, 2023Equipment, Electrical system. This Bulletin provides reference tables and photos to use for determining the infotainment head unit supplier and generation.
• 10240110Jul 11, 2023Equipment. This bulletin announces the recommended cleaning procedures to followed when encountering vehicles with long time exposure to pollen on painted surfaces on vehicles imported from Japan. This bulletin does not apply to SIA built vehicles.
• 10238440Jun 13, 2023Transmission and drivetrain, Engine cooling. This service bulletin provides a temporary repair procedure to address vibrations and/or judder concerns experienced on turns during acceleration.
• 10238443Jun 6, 2023Electrical 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 utilized in the models as listed.
• 10238438Jun 5, 2023Electrical system, Equipment, Engine cooling, Other or unknown. This Service Information Bulletin provides the diagnostic procedure for the STARLINK® Remote Engine Start (RES). All Gen2 and Gen3 Telematics Equipped Models.
• 10237276May 15, 2023Electrical system, Equipment. Map Data Update Procedure for Harman Gen 3.1 Navigation Equipped Head Units (H/U).
• 10237273May 11, 2023Equipment, 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.
• 10237241May 4, 2023Equipment, Engine cooling, Electrical system. This Bulletin announces additional diagnostic procedures and a detailed flow chart to be used when diagnosing customer concerns regarding the operation of the STARLINK Remote Engine Start (RES) feature.
• 10237239May 2, 2023Equipment, Electrical 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.
• 10235285Apr 5, 2023Equipment, Electrical system. This Service Information Bulletin provides helpful procedures and best practices to utilize when customers present with concerns relating to the operation of their Gen 2/Gen 3 Telematics system equipped Subaru.
• 10233907Mar 23, 2023Equipment, Electrical system. This Bulletin provides reference tables and photos to use for determining the infotainment head unit supplier and generation.
• 10232239Feb 28, 2023Equipment, Electrical system. This Service Information 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.
• 10232237Feb 28, 2023Electrical system, Equipment. When attempting to complete the STARLINK Telematics subscription process, an Error Code 202 and / or 204 may occur preventing the process from completing successfully.
• 10232214Feb 7, 2023Equipment, 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.
• 10226867Nov 17, 2022Electrical 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 utilized in the models as listed.
• 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.

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