2021 Subaru Ascent technical service bulletins
398 technical service bulletins and manufacturer communications cover the 2021 Subaru Ascent.
Bulletins tell dealers how to fix known problems. A warranty extension means the manufacturer pays for that repair for longer.
- This bulletin announces a change to the troubleshooting tree when diagnosing DTC P2404 EVAP SYSTEM LEAK...
- This bulletin the announces diagnostic procedures and availability of new Engine Control Module (ECM)...
- This is an update announcement regarding the TechShare & NorthStar Integration
- This Service Information Bulletin announces Service Manual updates for the diagnosis of hands-free calling...
- This announcement provides information on the connected services platform for Subaru EVs.
- This bulletin provides a step-by-step diagnostic procedure for resolving Remote Engine Start (RES)...
- This Service Information Bulletin has been developed to outline the steps for gathering basic but...
- This announcement provides information on DCM replacememts due to a parasitic draw.
- This announcement provides information on an outage affecting the Subaru Select Monitor 5 application.
- This Bulletin provides a diagnostic procedure for customer concerns about hesitation, reduced...
- This Service Information Bulletin announces the availability of ThreeBond 1216J (SOA868V9640) designed for...
- This Service Information Bulletin announces the release of a new diagnostic assistance application for...
- This announcement provides information on a new software update for the Midtronics Dss and DCA machines.
- This announcement provides information on the TechShare & NorthStar Intergration
- This bulletin contains illustrations of exchange components and their manufacturer as well as a...
- This Bulletin provides a repair procedure for increased dark current and unintended battery discharge that...
- This Bulletin provides a diagnostic procedure for customer concerns about hesitation, reduced...
- This announcement provides information on an enhancement of the TechShare CVT diagnostic assitance...
- This bulletin provides paint code information for 2027 model year vehicles.
- This announcement provides an update to all 2027 model year Subaru warranty coverages for wear items and...
- This bulletin has been developed to outline the steps for gathering basic but essential information during...
- In the interest of customer satisfaction, Subaru of America, Inc. (SOA) is extending the New Car Limited...
- This announcement provides an update to the WRH-26 certification label recall.
- This bulletin provides additional examples, diagnostics tips and installation tips as helpful aids to be...
- This bulletin announces the availability of new reprograming files for the Engine Control Module (ECM)...
- This bulletin provides a procedure to address customer concerns of surface rust accumulating in the top...
- Subaru of America, Inc. (Subaru) has initiated a non-compliance recall for certain 2026 model year...
- This Announcement provides diagnostic assistance for CVT issues.
- This Bulletin provides updated diagnostic procedures to follow and a brief questionnaire to complete when...
- This Service Information Bulletin outlines a systematic procedure for diagnosing parasitic draw...
- This bulletin announces availability of new reprogramming files developed to address SYMPTOM 1: A jerk or...
- This service bulletin outlines the diagnostic and repair procedure for white smoke emitted from the...
- This Bulletin has been developed to outline the steps for gathering basic but essential information during...
- Techtips newsletter locator index.
- This bulletin contains illustrations of exchange components and their manufacturer as well as a...
- WRH-26
- This announcement provides information on WRH-26 affected CPO and Used Vehicle Inventory.
- This announcement provides WRH-26 recall information for customers.
- This announcement provides WRH-26 recall information for owner contact and a vehicle disclosure form.
- Subaru of America, Inc. (Subaru) has initiated a non-compliance recall for certain 2026 model...
- This announcement provides an update for retailer inventory affected by the WRH-26 non-compliance recall.
- This announcement is to inform retailers of the non-compliance recall/stop sale parts update and repair...
- This announcement provides information on a temporary process for addressing affected SSLP vehicles under...
- This bulletin provides updated parts information and a service procedure to follow for removing...
- This bulletin outlines the diagnostic and repair procedure for white smoke emitted from the exhaust after...
- This announcement is requesting retailer staff to retain the EyeSight protective hood covers from...
- This bulletin provides guidance when diagnosing chain slip, judder, shudder, and hesitation concerns on...
- This bulletin announces the design change made to the exhaust manifold flange nut material that has been...
- This Bulletin announces a correction to the diagnostic procedures for certain CVT related DTCs, including...
- This bulletin contains additional information for recommended materials listed in the Service Manuals for...
- This bulletin provides updated parts information and a service procedure to follow for removing...
- This bulletin announces a design change to the TR690 CVT control valve body which features an enhanced...
- This announcement provides information on the remanufactured CVT transmission program.
- This bulletin announces the diagnostic procedures to be used when DTCs B1571(REFERENCE CODE...
- This Service Information Bulletin was developed to provide interim guidance for vehicles exhibiting DTC B2A20.
- This Bulletin provides the diagnostic procedures to be followed when addressing customer concerns of...
- This bulletin announces the new procedure and Warranty Fail Code for FirstTime air conditioning (A/C)...
- In the interest of customer satisfaction, Subaru of America, Inc. (SOA) is extending the New Car Limited...
- This bulletin contains information to help when attempting to complete the STARLINK Telematics...
- This announcement provides information on the use of aftermarket services or tools for programming...
- This Service Information Bulletin was developed to provide interim guidance for 2026 model year vehicles...
- This Subaru service and technical support line newsletter provides information on the next phase of TechShare.
- This announcement has been created to address difficulties with software updates on Subaru Select Monitors...
- This Bulletin provides the diagnostic procedure for the STARLINK® Remote Engine Start (RES).
- This bulletin announces the diagnostic procedures to be used when DTCs P2096 (POST CATALYST FUEL TRIM...
- This bulletin announces availability of new front wheel hub assemblies incorporating bearing surfaces...
- This Service Information Bulletin provides the Service Manual Correction to the diagnostic procedure for...
- This bulletin contains illustrations of exchange components and their manufacturer as well as a...
- Subaru service article locator.
- This bulletin provides information on the load carrying capacity reduced label when a port-installed or...
- Subaru tech tips newsletter article locator.
- This bulletin announces the diagnostic procedures to be followed when encountering cases of the Remote...
- This bulletin provides guidance when diagnosing chain slip, judder, shudder, and hesitation concerns on...
- This Service Information Bulletin outlines a systematic procedure for diagnosing parasitic draw...
- This bulletin announces the availability of new seat ventilation blower units which have been redesigned...
- This Bulletin provides details on a new formal testing, charging, and tracking procedure for all 12-volt...
- This Bulletin outlines a comprehensive update to the dark current/parasitic draw diagnosis & testing...
- This bulletin announces the availability of new seat ventilation blower units
- This bulletin addresses cases when attempting to complete the STARLINK Telematics subscription process, an...
- In the interest of customer satisfaction Subaru of America, Inc. (SOA) is extending the New Car Limited...
- This bulletin announces a design change made to the second row inner seat belt buckle assembly to address...
- This Bulletin provides details on a new formal testing, charging, and tracking procedure for all 12-volt...
- This Bulletin announces the release of a new diagnostic assistance application for TR690 CVT-equipped...
- This Bulletin provides helpful procedures and best practices to utilize when customers present with...
- Subaru of America, Inc. will release an OTA to perform a software update to the DCM. This is a preventive OTA.
- This bulletin provides information on paint codes for vehicles in the 2026 line up.
- Subaru Service Technical Support Newsletter special edition.
- This bulletin provides additional examples, diagnostics tips and installation tips as helpful aids to be...
- This Bulletin announces the availability of a new part Extender Belt
- This announcement provides information about a Subaru of America, Inc. preliminary settlement in a class...
- This bulletin announces the availability of new seat ventilation blower units.
- In the interest of customer satisfaction Subaru of America, Inc. (SOA) is extending the New Car Limited...
- This OTA is released to address Telematic functions that may stop working after a certain amount of time...
- The following information addresses reprogramming file availability and a software update installation...
- This bulletin provides information on a new reprogramming procedure (FOTA) to optimize the Harman Gen 3.1...
- This bulletin announces the new procedure and Warranty Fail Code for FirstTime air conditioning (A/C)...
- This announcment provides information on the release of the latest software updates to the Subaru...
- This Bulletin provides additional diagnostics to follow when addressing a Telematics-related DTC B2A16.
- This announcement is to bring attention to the OTA for In-vehicle service appointment scheduler and...
- This Service Information bulletin announces the new procedure and Warranty Fail Code for FirstTime air...
- The following information addresses reprogramming file availability and a software update installation...
- The purpose of
- This bulletin announces the new procedure and Warranty Fail Code for FirstTime air conditioning (A/C)...
- This bulletin announces a design change to the knob of the center air vent grilles.
- This bulletin announces the repair procedures for the left and right-side horns to address DTC B1610...
- This Service Bulletin provides additional diagnostics to follow when addressing a Telematics-related DTC...
- This bulletin announces availability of new door window regulator assemblies and door glass run channel...
- This bulletin announces a design change to the hood lock switch portion of the hood lock assembly.
- This bulletin announces design changes made to the rear axle hubs
- This Bulletin announces the diagnostic procedures to be followed when diagnosing engine oil leakage on FA...
- This Bulletin announces availability of a User Guide and an informative video to supplement the recent...
- This announcement is in regard to the warranty extension initiated for windshields for the models listed.
- This bulletin announces design changes made to the Power Rear Gate Drive (PRG) Unit to address concerns of...
- In the interest of customer satisfaction, Subaru of America, Inc. (SOA) is extending the New Car Limited...
- The purpose of
- In the interest of customer satisfaction, Subaru of America, Inc. (SOA) is extending the New Car Limited...
- This Bulletin has been developed to outline the steps for gathering basic but essential information during...
- This bulletin announces the design change made to the left and right A-Pillar trim panels which will...
- When attempting to complete the STARLINK Telematics subscription process, an Error Code 202 and / or 204...
- This Bulletin announces diagnostic procedures to be followed when working with a Power Rear Gate (PRG).
- This bulletin announces the design change made to the exhaust manifold flange nuts
- This bulletin announces availability of new door window regulator assemblies and door glass run channel...
- In the interest of customer satisfaction, Subaru of America, Inc. (SOA) is extending the New Car Limited...
- This Service Bulletin provides additional diagnostics to follow when addressing a Telematics-related DTC...
- This announcement is in regard to special service tool shipment will be shipped directly to the Subar...
- This bulletin gives information on extended New Car Limited Warranty for CP1 and Gen 3.1 Head Units.
- Electrical system
- A head unit OTA will be available via cellular network for Mid and High Grade CP1.5 head units.
- This bulletin announces the repair procedures to be followed when DTC P1449 (EVAP System Clog Detected) is...
- This announcement is in regard to settlement in a class action lawsuit for vehicles that will receive a...
- This bulletin is for information purposes only.The bulletin adresses design changes of the headlamps and...
- This bulletin announces availability of new reprogramming files developed to address the two symptoms...
- This bulletin announces the initialization service procedures to be followed when diagnosing and/or...
- This annocement is to inform dealers to the Gen 3.1 Head Unit OTA will be available via Wi-Fi. The update...
- This bulletin announces availability of new reprogramming files developed to address symptoms which a jerk...
- This bulletin details an important regulation issued by the federal safety agency which impacts the way...
- Subaru of America, Inc. has announced a warranty extension to the front brakes which will address concerns...
- This Service Information Bulletin announces the preferred practices to be used when handling vehicles...
- The CP1.5 RCs OTA is available for all mid and high grade CP1.5 head units.
- This Service Information bulletin is being released as guidance for proper testing and charging of vehicle...
- This Service Information Bulletin announces the diagnostic procedures to be followed when diagnosing...
- This bulletin announces the design change made to the rear gate glass, it is intended to address cases of...
- This bulletin announces availability of the NEW genuine Subaru engine oil filter.
- This bulletin outlines the judgment criteria to be used when inspecting front transverse link bushings to...
- This Service Information Bulletin announces important diagnostic information to utilize when the Data...
- This bulletin contains illustrations of exchange components and their manufacturer as well as a...
- This bulletin provides information on a new reprogramming procedure (FOTA) to optimize the Harman Gen 3.1...
- This bulletin is in the interest of customer satisfaction, Subaru of America, Inc. (SOA) is extending the...
- This announcement provides information on a warranty extension for Ascent front brake judder/squeak on...
- This annoucement provides parts personnel information about remanufactured transmissions that will no...
- This announcement provides information for retailers to install the latest infotainment system software...
- This bulletin announces important diagnostic information to utilize when testing the Data Communication...
- This announcement provides information on Takata Recall Escalated Towing Program.
- This thermo control valve video contains information on the replacement of thermo control valve.
- This Bulletin provides SOA paint codes to help eliminate possible confusion for 2025 MY vehicles.
- This bulletin addresses reprogramming file availability and a software update installation procedure to...
- This Bulletin provides guidance for diagnosing a leaking front or rear suspension strut.
- This information announces reprograming file availability for Gen 4.5 Denso CP1.5 Audio and Navigation systems
- This bulletin provides diagnosis and procedure information to be applied when diagnosing potential fluid...
- This bulletin announces the availability of new reprogramming files developed to address cases of DTC...
- To satisfy current supply demands, a new Subaru alternative replacement battery is now available.
- This bulletin addresses the reprogramming file availability and a software update installation procedure...
- This bulletin addresses an error code 202 and or 204 when attempting to complete the STARLINK telematics...
- This bulletin has been developed for use as a quick reference tool to aid in diagnosing operational...
- This bulletin announces changes in design to the front strut assemblies which will address cases of...
- This bulletin provides the diagnostic procedure for Harman Infotainment Systems when DTC B2255 is detected
- This bulletin addresses rumbling and or rattling coming from the undercarriage while traveling over bumps
- This bulletin announces design changes made to the Exhaust Pipe Front (EPF) to address concerns of...
- This Service Information Bulletin announces the revised break-in procedure for the A/C compressor.
- This bulletin announces the availability new service procedure developed for the diagnosis of the...
- This Service Information Bulletin announces diagnostic service procedures to be followed when DTC P0420...
- This Service Bulletin is to inform you of the diagnosis procedure of the Harman Infotainment System when...
- This Service Information Bulletin announces diagnostic service procedures to be followed when DTC P0420...
- This bulletin announces availability of a new Genuine Subaru Alternative Replacement Battery introduced to...
- This service bulletin provides a repair procedure to address vibrations and/or judder concerns experienced...
- This bulletin announces availability of new reprograming files for the Transmission Control Module (TCM)...
- This Bulletin announces additional information regarding error codes 1403- 1407 encountered when...
- This Service Information Bulletin announces additional diagnostic procedures and a detailed flow chart to...
- This bulletin announces design changes made to the Exhaust Pipe Front (EPF) to address concerns of...
- This bulletin announces the repair procedure for a rubbing-type sound that can be heard from the side of...
- This Service Information Bulletin has been developed to outline the steps for gathering basic but...
- This bulletin announces diagnostic procedures and availability of new Engine Control Module (ECM)...
- This Bulletin provides reference tables and photos to use for determining the infotainment head unit...
- This bulletin announces availability of reprogramming files to optimize the Transmission Control Module...
- This Service Information Bulletin announces the proper diagnostic procedures regarding oil leakage from...
- This bulletin announces availability of new Harman audio unit amplifier units with revised internal logic...
- This Service Information Bulletin provides updated diagnostic procedures to follow and a brief...
- This service bulletin provides a temporary repair procedure to address vibrations and/or judder concerns...
- This Service Information Bulletin provides the diagnostic procedure for the STARLINK® Remote Engine Start...
- This bulletin provides a procedure to address customer concerns of surface rust accumulating in the top...
- This bulletin announces availability of reprogramming files to optimize the Transmission Control Module (TCM).
- Map Data Update Procedure for Harman Gen 3.1 Navigation Equipped Head Units (H/U).
- This bulletin announces availability of the one-time use mounting clip and spacer clip for the air bag...
- This Bulletin announces additional diagnostic procedures and a detailed flow chart to be used when...
- This Bulletin provides updated diagnostic procedures to follow and a brief questionnaire to complete when...
- This Service Information Bulletin announces a design change made to the Positive Crankcase Ventilation...
- This Bulletin announces additional cautions being added to the Owner’s Manual and Service Manual regarding...
- This bulletin provides a repair procedure to address a small number of customer concerns of the hood panel...
- This Service Information Bulletin provides helpful procedures and best practices to utilize when customers...
- This Service Information bulletin has been developed for use as a quick reference tool to aid in...
- This bulletin announces the availability of new reprograming files for the Engine Control Module (ECM).
- Electrical system
- WRL-22 ptc
- Update
- Equipment
- Service, Parts, and Claim Instructions For detailed service, parts, and claim instructions, please refer...
- Electrical system
- This bulletin announces availability of new Harman audio unit amplifier units with revised internal logic...
- This communication announces a new procedure for retailers to follow in the event their WRK-21 videoscope...
- This Bulletin provides additional procedures and a detailed flow chart to use when diagnosing customer...
- This Bulletin provides additional information for the diagnostic procedures concerning measurement of Dark...
- This bulletin announces a design change made to the front stabilizer bushings.
- This bulletin is being released as guidance for proper testing and charging of vehicle batteries.
- This bulletin provides updated parts information and a service procedure to follow for removing...
- The purpose of
- This Service Information Bulletin provides additional information for the diagnostic procedures concerning...
- Special Edition, 2012 current model subaru evaporative diagnostics and smoke testing.
- This Bulletin announces the preferred practices to be used when handling vehicles equipped with Gen2...
- The WRK-21 recall includes TCM reprogramming to prevent CVT chain slip
- This bulletin announces availability of new reprograming files for the Engine Control Module (ECM).
- The following information addresses reprogramming file availability and a software update installation...
- This bulletin announces the Service Manual correction for the diagnostic trouble tree for DTC B281C.
- This bulletin announces the proper diagnostic procedures regarding oil leakage from the oil level switch area.
- This bulletin has been developed to outline the steps for gathering basic essential information during...
- This bulletin provides helpful tips to better utilize the Subaru Select Monitor 4.
- WRK-21 CVT
- Map Data Update Procedure for Harman Gen 3.1 Navigation equipped Head Units (H/U).
- This bulletin provides updated diagnostic procedures to follow and a brief questionnaire to complete when...
- This bulletin announces availability of new Harman audio unit amplifier units with revised internal logic...
- This Bulletin announces design changes to the engine oil and CVT fluid drain plugs.
- This bulletin provides additional diagnostics to follow when addressing a Telematics-related DTC B2A16.
- Map Data Update Procedure for Harman Gen 3.1 Navigation Equipped Head Units.
- This bulletin announces the availability of diagnostic information regarding accessory remote engine start...
- This bulletin announces an additional service procedure for timing chain and / or cam sprocket replacement...
- Effective today (October 1, 2021), the recommended replacement battery for the 19-21 MY Ascent models is...
- This bulletin provides important information regarding diagnosis and replacement (when applicable) of the...
- This bulletin provides additional information for the diagnostic procedures concerning measurement of dark...
- This Bulletin announces availability of new front brake pad kit established to address concerns of a...
- This bulletin provides additional information for the diagnostic procedures concerning measurement of dark...
- This bulletin announces availability of new starter motors and ECM reprogramming files created to address...
- Equipment
- This bulletin announces a design change made to the front stabilizer bar bushing clamps.
- This bulletin announces the service procedure for addressing possible water entry into the interior from...
- This bulletin provides additional information for the diagnostic procedures concerning measurement of Dark...
- Engine and engine cooling
- Engine and engine cooling
- Diagnostic Information for Alleged Chain Slip Condition on TR580 / TR690 Transmissions.
- This bulletin contains additional information for recommended materials listed in the Service Manuals for...
- This bulletin outlines changes in the service procedure for replacement of the Power Rear Gate control module.
- This bulletin is to advise of SOA’s revised catalytic converter recycling program shipping procedure.
- This bulletin outlines changes in the service procedure for engine oil pressure inspection.
- This bulletin outlines changes in the service procedure for scavenge pump assembly installation.
- Description of current changes to Service Manuals available via the Subaru Technical Information System...
- This bulletin announces design changes made to the front and rear door glass run channels.
- This bulletin announces a design change made to the TPMS valve assemblies.
- This bulletin provides additional procedures and a detailed flow chart to use when diagnosing customer...
- This bulletin announces availability of new audio unit amplifier units with revised internal logic...
- This bulletin announces changes made to the rear door weatherstrip to optimize sealing performance.
- In January 2021, the replacement battery application for all Ascent and 2017- 2021 Impreza models were...
- This Service Information Bulletin provides updated diagnostic procedures to follow and a brief...
- SOA821B600
- +H31&I31
- This bulletin announces the upcoming issuance to all retailers of an essential tool update kit for the...
- This bulletin announces a change made to the MFD software to keep the affected units listed below...
- This bulletin announces a design change made to the power window main switches.
- This bulletin provides helpful information about operating conditions observed in the field for...
- This bulletin announces availability of reprogramming files for the Engine Control Module (ECM).
- This bulletin announces availability of reprogramming files for the ECM. These new files will address DTC...
- To help reduce confusion and increase technician efficiency, Subaru of America, Inc. (SOA) has developed...
- This bulletin provides updated diagnostic procedures to follow and a brief questionnaire to complete when...
- This bulletin has been developed for use as a quick reference tool to aid in diagnosing operational...
- This bulletin provides information related to the telematics system's Automatic Collision Notification...
- This bulletin provides helpful procedures and best practices to utilize when customers present with...
- This bulletin provides an overview and basic instructions for use of the “Destination to Vehicle” feature...
- This bulletin provides important information regarding diagnosis and replacement of the STARLINK...
- This bulletin provides information related to error code 202 and/or 204 generated during the Gen 2...
- Reprogramming File Availability for Optimization of Harman Gen 3.1 and Gen 3.1α Audio and Navigation Head...
- The purpose of
- This Service Information Bulletin provides updated diagnostic procedures to follow when diagnosing an...
- This bulletin provides information related to error code(s) 202 and/or 204 generated during the Gen 2...
- Map update for Harman Gen 3.1 Navigation Equipped Head Units.
- This Service Information Bulletin provides corrected diagnostics containing a revised flow for certain CVT...
- This Service Information Bulletin provides corrected and updated procedures to follow when replacing the...
- This Service Information Bulletin announces additional diagnostic procedures for TPMS related DTC C2921 on...
- Replacement Key and Immobilizer Info
- Effective with all 2015 model year cars and forward, the oil change interval is changing to 6,000 miles or...
- Oil Filler Cap Gasket Coming Unseated
- Puddle Light Recall
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