2025 Subaru Ascent TSBs
120 Technical Service Bulletins across 17 categories
Categories
Pre-Delivery & Maintenance
19 bulletinsThis announcement provides WRH-26 recall information for owner contact and a vehicle disclosure form.
This announcement provides WRH-26 recall information for customers.
This announcement provides information on a temporary process for addressing affected SSLP vehicles under the WRH-26...
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recall.
This Service Information Bulletin was developed to provide removal and installation tips to be followed when working...
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with EyeSight Stereo Cameras.
This bulletin contains additional information for recommended materials listed in the Service Manuals for individual...
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models.
This bulletin contains additional information for recommended materials listed in the Service Manuals for individual...
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models.
This announcement provides information on the use of aftermarket services or tools for programming immobilizer...
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keys/fobs.
This bulletin contains additional information for recommended materials listed in the Service Manuals for individual...
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models.
This Subaru service and technical support line newsletter provides information on the next phase of TechShare.
This Service Information Bulletin provides the Service Manual Correction to the diagnostic procedure for DTC B2A16...
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(Immobilizer Key Collation Diagnosis).
Subaru service article locator.
Subaru service article locator.
Subaru Service Technical Support Newsletter special edition.
This announcement is to bring attention to the OTA for In-vehicle service appointment scheduler and In-vehicle message...
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center.
This Service Bulletin provides additional diagnostics to follow when addressing a Telematics-related DTC B2A16.
This Service Information Bulletin details a new procedure for conducting a CommCheck on vehicles equipped with a GEN...
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3/GEN 3+ DCM.
This bulletin contains additional information for recommended materials listed in the Service Manuals for individual...
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models.
"This Service Bulletin provides additional diagnostics to follow when addressing a Telematics-related DTC B2A16."
This announcement is in regard to special service tool shipment will be shipped directly to the Subar retailers during...
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February.
Other
17 bulletinsThis bulletin contains illustrations of exchange components and their manufacturer as well as a description of the proper exchange procedure.
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This is an revised version of the original bulletin.
Techtips newsletter locator index.
This bulletin contains illustrations of exchange components and their manufacturer as well as a description of the proper exchange procedure.
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This is an revised version of the original bulletin
This announcement provides information on WRH-26 affected CPO and Used Vehicle Inventory.
This bulletin contains information to help when attempting to complete the STARLINK Telematics subscription process, an...
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Error Code 202 and / or 204 may occur preventing the process from completing successfully
This bulletin contains illustrations of exchange components and their manufacturer as well as a description of the...
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proper exchange procedure.
Subaru tech tips newsletter article locator.
Subaru tech tips newsletter article locator.
This bulletin addresses cases when attempting to complete the STARLINK Telematics subscription process, an Error Code...
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202 and / or 204 may occur preventing the process from completing successfully.
This Bulletin provides helpful procedures and best practices to utilize when customers present with concerns relating to...
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the operation of their Gen 2/Gen 3 Telematics system equipped Subaru.
This bulletin contains illustrations of exchange components and their manufacturer as well as a description of the...
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proper exchange procedure.
This OTA is released to address Telematic functions that may stop working after a certain amount of time from the...
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vehicle's production.
This Bulletin provides additional diagnostics to follow when addressing a Telematics-related DTC B2A16.
The purpose of this bulletin is to provide replacement key and immobilizer information along with an overview of the...
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Subaru Lock Information web-site.
This Bulletin announces availability of a User Guide and an informative video to supplement the recent releases to...
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retailers of the SOA321152 and SOA321153 Terminal Test Kits.
This Bulletin announces diagnostic procedures to be followed when working with a Power Rear Gate (PRG).
When attempting to complete the STARLINK Telematics subscription process, an Error Code 202 and / or 204 may occur...
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preventing the process from completing successfully.
Infotainment
15 bulletinsThis bulletin has been developed to outline the steps for gathering basic but essential information during diagnosis of Infotainment concerns.
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This is an revised version of the original bulletin.
This bulletin announces a reprogramming file availability and provides a software update installation procedure to...
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optimize the new Gen 4.5 Denso CP1.5 Audio and Navigation head units utilized in the models listed. This is an revised version of the original bulletin.
This Bulletin has been developed to outline the steps for gathering basic but essential information during diagnosis of Infotainment concerns.
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(This is an revised version of the original bulletin.)
This bulletin provides instruction for use (FOTA) of a new reprogramming procedure to optimize the Denso Gen 4.5 Audio...
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and Navigation system utilized in the models listed. (This is an revised version of the original bulletin).
"This bulletin provides a new diagnostic procedure for vehicles equipped with a Denso CP 1, 1.5 and 2.5 head units to...
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provide an enhanced version of the troubleshooting steps for Sound does not come out from the speaker."
The following information announces reprogramming file availability and provides a software update installation...
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procedure to optimize the new Gen 4.5 Denso CP1.5 Audio and Navigation head units utilized in the models listed.
This bulletin announces reprogramming file that provides a software update installation procedure to optimize the new...
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Gen 4.5 Denso CP1.5 Audio and Navigation head units utilized in the models listed.
This Service Bulletin is to inform you of a procedure to restore CP1.5s normal operation by initializing the head unit.
This bulletin announces reprogramming file availability and provides a software update installation procedure to...
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optimize the new Gen 4.5 Denso CP1.5 Audio and Navigation head units utilized in the models listed.
This bulletin provides instruction for use of a new reprogramming procedure to optimize the Denso Gen 4.5 Audio and...
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Navigation system utilized in the models listed.
This OTA is an software update to provide audio improvements for the models listed.
The following information announces reprogramming file availability and provides a software update installation...
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procedure to optimize the new Gen 4.5 Denso CP1.5 Audio and Navigation head units utilized in the models listed.
The following information announces reprogramming file availability and provides a software update installation...
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procedure to optimize the new Gen 4.5 Denso CP1.5 Audio and Navigation head units utilized in the models listed.
This Bulletin has been developed to outline the steps for gathering basic but essential information during diagnosis of...
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Infotainment concerns.
A head unit OTA will be available via cellular network for Mid and High Grade CP1.5 head units.
Engine
14 bulletinsThis Bulletin provides a diagnostic procedure for customer concerns about hesitation, reduced acceleration, or lack of...
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power when driving uphill or under heavy engine load.
This bulletin announces the design change made to the A/C control module and blower motor unit assembly.
This bulletin provides updated parts information and a service procedure to follow for removing accumulated carbon...
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deposits from fuel injectors and internal engine components (e.g. intake valves and / or manifold, and combustion chambers). (This is an revised version of the original bulletin.)
This bulletin provides updated parts information and a service procedure to follow for removing accumulated carbon...
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deposits from fuel injectors and internal engine components (e.g. intake valves and / or manifold, and combustion chambers). (This is an revised version of the original bulletin.)
This bulletin announces a design change to the TR690 CVT control valve body which features an enhanced line pressure...
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sensor O-ring, designed to prevent abnormal sensor readings caused by O-ring leakage.
This Bulletin provides the diagnostic procedure for the STARLINK Remote Engine Start (RES).
This bulletin provides updated parts information and a service procedure to follow for removing accumulated carbon...
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deposits from fuel injectors and internal engine components (e.g. intake valves and / or manifold, and combustion chambers).
This bulletin announces the diagnostic procedures to be used when DTCs P2096 (POST CATALYST FUEL TRIM SYSTEM TOO LEAN...
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BANK 1) and P2097 (POST CATALYST FUEL TRIM SYSTEM TOO RICH BANK 1) are detected by the Engine Control Module (ECM).
This bulletin announces the diagnostic procedures to be used when DTCs P2096 (POST CATALYST FUEL TRIM SYSTEM TOO LEAN...
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BANK 1) and P2097 (POST CATALYST FUEL TRIM SYSTEM TOO RICH BANK 1) are detected by the Engine Control Module (ECM).
This bulletin announces the diagnostic procedures to be followed when encountering cases of the Remote Engine Start...
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(RES) system being the only non-functioning feature with telematics.
This bulletin announces the availability of reprogramming files for the Engine Control Module (ECM) to address the...
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following Diagnostic Trouble Code (DTC): P062F - Internal Control Module EEPROM Error.
This bulletin announces the availability of reprogramming files for the Engine Control Module (ECM).
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This logic was developed to address the following Diagnostic Trouble Code (DTC): P062F - Internal Control Module EEPROM Error.
This bulletin announces the availability of reprogramming files for the Engine Control Module (ECM).
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This logic was developed to address the following Diagnostic Trouble Code (DTC): P062F - Internal Control Module EEPROM Error. If DTC P062F is detected by the ECM, perform the reprogramming procedure outlined in this bulletin.
This Bulletin announces the diagnostic procedures to be followed when diagnosing engine oil leakage on FA and FB type...
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engines.
Software & Calibration
10 bulletinsThis announcement provides information on a new software update for the Midtronics Dss and DCA machines.
This announcement provides an update to all 2027 model year Subaru warranty coverages for wear items and adjustments.
This announcement provides an update to the WRH-26 certification label recall.
WRH-26 Certification Label Non-Compliance Recall- Parts and SSLP Process Updates.
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 procedure.
This announcement has been created to address difficulties with software updates on Subaru Select Monitors with DST-010...
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interface firmware has been updated.
This Bulletin outlines a comprehensive update to the dark current/parasitic draw diagnosis & testing procedures.
Subaru of America, Inc.
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will release an OTA to perform a software update to the DCM. This is a preventive OTA.
This bulletin announces the availability of reprogramming files designed to improve the functionality of the Keyless...
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Access Control Unit.
Body & Paint
8 bulletinsThis bulletin provides paint code information for 2027 model year vehicles.
This bulletin provides additional examples, diagnostics tips and installation tips as helpful aids to be used when...
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working with sunroof seals and sunroof frame assemblies on Ascent models. This is an revised version of the original bulletin.
This bulletin announces a repair procedure developed to address cases of the driver side mirror glass vibrating at...
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highway speeds.This is an revised version of the original bulletin.
This bulletin announces an inspection procedure for the Smart Rear View Mirror Assembly.
This announcement is requesting retailer staff to retain the EyeSight protective hood covers from Generation 4 EyeSight...
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cameras.
This bulletin provides information on paint codes for vehicles in the 2026 line up.
This bulletin announces a repair procedure developed to address cases of the driver side mirror glass vibrating at...
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highway speeds.
This bulletin announces a design change to the hood lock switch portion of the hood lock assembly.
Transmission
7 bulletinsThis announcement provides information on an enhancement of the TechShare CVT diagnostic assitance application.
This Service Information Bulletin announces the release of a new diagnostic assistance application for TR690 and TR580 CVT-equipped vehicles.
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This is an revised version of the original bulletin.
This Announcement provides diagnostic assistance for CVT issues.
This bulletin provides guidance when diagnosing chain slip, judder, shudder, and hesitation concerns on the TR690 model...
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CVT transmissions used in the models listed. (This is an revised version of the original bulletin.)
This announcement provides information on the remanufactured CVT transmission program.
This bulletin provides guidance when diagnosing chain slip, judder, shudder, and hesitation concerns on the TR690 model...
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CVT transmissions used in the models listed.
This Bulletin announces the release of a new diagnostic assistance application for TR690 CVT-equipped vehicles.
Electrical
7 bulletinsThis Service Information Bulletin outlines a systematic procedure for diagnosing parasitic draw (dark/standby current)...
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in vehicles experiencing battery drain when the ignition is off, leading to no-start conditions or frequent jump-starts.This is an revised version of the original bulletin.
This bulletin announces design changes to the heated steering wheel switch assembly and harness.
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The new switch design relocates the connector, which requires a different harness routing.
This bulletin announces the diagnostic procedures to be used when DTCs B1571(REFERENCE CODE INCOMPATIBILITY IMMOBILIZER...
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CM TO ECM) and B1572(IMM CIRCUIT EXCEPT ANTENNA CIRCUIT) are detected by Keyless Access with Push Button Start(KACM).
This bulletin announces a new Genuine Subaru Replacement battery for use in applications where the current SOA821B700...
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battery is specified.
This Service Information Bulletin outlines a systematic procedure for diagnosing parasitic draw (dark/standby current)...
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in vehicles experiencing battery drain when the ignition is off, leading to no-start conditions or frequent jump-starts.
This bulletin announces the availability of reprogramming files for the HYDRAULIC UNIT ASSEMBLY(VDC).
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This logic was developed to address the following Diagnostic Trouble Code (DTC): C1411 ELECTRICAL CONTROL MODULE. If DTC C1411 is detected with a 30A2 failure detail code by the VDC perform the reprogramming procedure outlined.
This announcment provides information on the release of the latest software updates to the Subaru Midtronics DSS-5000...
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Battery Diagnostic tool.
HVAC & Climate
7 bulletinsThis bulletin announces the new procedure and Warranty Fail Code for FirstTime air conditioning (A/C) performance...
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concerns possibly resulting from an undetected A/C refrigerant leak.
This bulletin announces the new procedure and Warranty Fail Code for FirstTime air conditioning (A/C) performance...
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concerns possibly resulting from an undetected A/C refrigerant leak.
This bulletin announces the availability of new seat ventilation blower units which have been redesigned to address some...
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cases of a vibration-type sound emitting from the blower unit during seat ventilation operation.
This bulletin announces the new procedure and Warranty Fail Code for FirstTime air conditioning (A/C) performance...
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concerns possibly resulting from an undetected A/C refrigerant leak.
"This bulletin announces the new procedure and Warranty Fail Code for FirstTime air conditioning (A/C) performance...
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concerns possibly resulting from an undetected A/C refrigerant leak. To improve Fixed Right First-Time (FRFT) and customer satisfaction, SOA is introducing a new procedure and fail code for first-time suspected A/C refrigerant leaks for cases when a Technician is unable to find the source of the leak or believes there was a potential factory under charge of the A/C system refrigerant."
This Service Information bulletin announces the new procedure and Warranty Fail Code for FirstTime air conditioning...
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(A/C) performance concerns possibly resulting from an undetected A/C refrigerant leak.
This bulletin announces the new procedure and Warranty Fail Code for FirstTime air conditioning (A/C) performance...
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concerns possibly resulting from an undetected A/C refrigerant leak. To improve Fixed Right First-Time (FRFT) and customer satisfaction, SOA is introducing a new procedure and fail code for first-time suspected A/C refrigerant leaks for cases when a Technician is unable to find the source of the leak or believes there was a potential factory under charge of the A/C system refrigerant.
Hybrid & EV
4 bulletinsSubaru of America, Inc.
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(Subaru) has initiated a non-compliance recall for certain 2026 model year Crosstrek Hybrid vehicles, 2025-2026 model year Forester & Forester Hybrid vehicles, and 2019- 2026 Ascent vehicles due to incorrect information listed on the certification label. This is an revised version of the original bulletin.
Subaru of America, Inc.
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(Subaru) has initiated a non-compliance recall for certain 2026 model yearCrosstrek Hybrid vehicles, 2025-2026 model year Forester & Forester Hybrid vehicles, and 2019- 2026 Ascent vehicles due to incorrect information listed on the certification label. (This is an revised version of the original bulletin.)
This Bulletin provides details on a new formal testing, charging, and tracking procedure for all 12-volt batteries in...
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new vehicle inventory.
This Bulletin provides details on a new formal testing, charging, and tracking procedure for all 12-volt batteries in...
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new vehicle inventory wjhich must be tested and reported every 30 days.
Fuel System
3 bulletinsThis service bulletin outlines the diagnostic and repair procedure for white smoke emitted from the exhaust after startup.
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This is an revised version of the original bulletin.
This bulletin outlines the diagnostic and repair procedure for white smoke emitted from the exhaust after startup.
The purpose of this bulletin is to advise of SOAs revised Catalytic Converter Recycling Program shipping procedure.
Brakes
3 bulletinsThis bulletin announces the availability of new reprogramming files developed to address cases of DTC C1C40 being...
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detected by the Electronic Brake Booster (EBB) in addition to Failure Detail Code 30A2 stored within the Freeze Frame Data (FFD).
This bulletin announces the availability of new reprogramming files developed to address cases of DTC C1C40 being...
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detected by the Electronic Brake Booster (EBB) in addition to Failure Detail Code 30A2 stored within the Freeze Frame Data (FFD).
This bulletin announces the availability of new reprogramming files developed to address cases of DTC C1C40 being...
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detected by the Electronic Brake Booster (EBB) in addition to Failure Detail Code 30A2 stored within the Freeze Frame Data (FFD).
Tires & Wheels
2 bulletinsThis Service Information Bulletin was developed to provide interim guidance for vehicles exhibiting DTC B2A20.
This Service Information Bulletin was developed to provide interim guidance for 2026 model year vehicles exhibiting DTC...
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B2A20 with gen 4 Telematics.
Steering
1 bulletinThis Bulletin provides the diagnostic procedures to be followed when addressing customer concerns of steering...
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wheel/vehicle body vibration when driving at highway speeds when tire/wheel balance is suspected.
Suspension
1 bulletinThis bulletin announces availability of new front wheel hub assemblies incorporating bearing surfaces having increased...
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resistance to imperfections resulting from shock loads.
Lighting
1 bulletinThis bulletin provides information on the load carrying capacity reduced label when a port-installed or...
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retailer-installed accessory exeeds 1.5 percent of the GVWR or 100 pounds, which ever is lower.
Air Bags & Safety
1 bulletinThis Bulletin announces the availability of a new part Extender Belt.
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This is for customers who find it necessary to increase the length of their seat belt.