2024 Subaru Ascent Technical Service Bulletins

229 technical service bulletins (TSBs) are on record for the 2024 Subaru Ascent. 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.

• 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.
• 11002729Jun 28, 2024Electrical system. This bulletin announces reprogramming file availability and provides a software update installation procedure to optimize the new Gen 4.5 Denso CP1.5 Audio and Navigation head units utilized in the models listed.
• 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.
• 11000835May 15, 2024Electrical system. This bulletin contains illustrations of exchange components and their manufacturer as well as a description of the proper exchange procedure.
• 11000830May 14, 2024Engine, Electrical system. 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.
• 11000822May 14, 2024Forward collision avoidance, Electrical system. This bulletin announces the availability of new reprogramming files developed to address DTC B28C7 (EyeSight Fan Motor RPM), E5 (halt code deected by EyeSight Stereo Camera), and B28A6 (Internal Stereo Camera Communication 1).
• 10253976Apr 18, 2024Lane departure, Electrical system, Forward collision avoidance, Equipment. This bulletin announces the availability of new reprogramming files developed to address cases were a halt code E5, B28A6 and or DTC B28C7 is detected by the EyeSight Stereo Camera assembly.
• 10253962Apr 12, 2024Equipment, Electrical system. This bulletin provides instruction for use of a new reprogramming procedure to optimize the Denso Gen 4.5 Audio and Navigation system utilized in the models listed.
• 10253953Apr 9, 2024Engine cooling, Electrical system, Transmission and drivetrain. This bulletin announces the availability of new reprogramming files developed to address cases of DTC P0890 (TCM Power Relay Sense Circuit Low) detected by the Engine Control Module (ECM).
• 10252553Mar 28, 2024Electrical system, Equipment. This bulletin announces a new Genuine Subaru Replacement battery for use in applications where the current SOA821B700 battery is specified.
• 10252549Mar 28, 2024Electrical system, Equipment. "This bulletin announces a new Genuine Subaru Replacement battery for use in applications where the current SOA821B700 battery is specified. This battery has higher capacity and is slightly larger in dimension."
• 10252547Mar 28, 2024Equipment, Electrical system. "This bulletin announces a new Genuine Subaru Replacement battery for use in applications where the current SOA821B700 battery is specified. This battery has higher capacity and is slightly larger in dimension."
• 10252495Mar 25, 2024Equipment, Electrical system. The bulletin contains information for exchange components, their manufacturer, as well as the proper exchange procedure.
• 10252494Mar 25, 2024Electrical system, Equipment. This bulletin provides information for all Gen 3 Telematics and Cp 1.5 infotainment equipped vehicles, starting with 2023MY, allowing access to valet mode through the head unit.
• 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, 2024Electrical system, Equipment. This bulletin addresses an error code 202 and or 204 when attempting to complete the STARLINK telematics subsription process.
• 10252456Mar 13, 2024Forward collision avoidance, Equipment, Electrical system. "This bulletin announces the availability of new reprogramming files developed to address the following three symptoms: EyeSight camera cooling fans becomes inoperable with DTC B28C7; EyeSight system enters temporary halt mode; Internal Stereo Camera Communication detected. "
• 10252454Mar 5, 2024Equipment, Electrical system. This bulletin provides the diagnostic procedure for Harman Infotainment Systems when DTC B2255 is detected. This update should prevent unnecessary replacement of the head unit or USB cable.
• 10251104Feb 26, 2024Electrical system. This bulletin announces updated reprogramming files available to optimize the new Gen 4.5 Denso CP1.5 Audio and Navigation head units.
• 10249606Jan 11, 2024Equipment, Electrical system. This Service Bulletin provides additional diagnostics to follow when addressing a Telematics-related DTC B2A16.
• 10249591Jan 2, 2024Equipment, Electrical system. This Service Information Bulletin outlines a new required procedure to follow when performing immobilizer-related repairs.
• 10248209Dec 21, 2023Electrical system. This bulletin announces a new Genuine Subaru Replacement battery for use in applications where the current SOA821B700 battery is specified.
• 10244903Oct 26, 2023Electrical system, Equipment, 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.
• 10244908Oct 12, 2023Equipment, Electrical system. This Service Information Bulletin is to inform you of the diagnosis procedure of the CP1/ CP1.5 Infotainment System when DTC B2256 is detected.
• 10241846Aug 31, 2023Equipment, Electrical system, 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.
• 10241806Aug 9, 2023Equipment, Body and structure. This bulletin announces SOA paint codes to help eliminate possible confusion.
• 10240122Jul 27, 2023Equipment, Electrical system. This bulletin contains illustrations of exchange components and their manufacturer as well as a description of the proper exchange procedure.
• 10240113Jul 13, 2023Equipment, Electrical system. This Bulletin provides reference tables and photos to use for determining the infotainment head unit supplier and generation.
• 10238472Jun 30, 2023Electrical system, Equipment. This Service Information Bulletin outlines a new required procedure to follow when performing immobilizer-related repairs.

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