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Service bulletins for the 2024 Subaru Ascent

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

229 on file from NHTSA, as of 2026-10-19.

By type

By component

By trouble code

Only bulletins with component: Electrical system are shown. Show all

Bulletins, newest first
01-168-09R2024-09-04. Service bulletin. ELECTRICAL SYSTEM; ENGINE. The purpose of this bulletin is to provide replacement key and immobilizer information along with an overview of the Subaru Lock Information web-site.
15-308-23R2024-09-04. Service bulletin. ELECTRICAL 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.
15-251-19R2024-09-04. Service bulletin. ELECTRICAL SYSTEM. This Bulletin provides additional diagnostics to follow when addressing a Telematics-related DTC B2A16.
15-305-22R2024-08-05. Service bulletin. ELECTRICAL 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.
Subarunet Announcement2024-08-05. Other. ELECTRICAL SYSTEM. This announcement provides information for retailers to install the latest infotainment system software for Denso CP 1.5.
15-308-23R2024-08-05. Service bulletin. ELECTRICAL 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.
Subarunet Announcement2024-08-05. Other. AIR BAGS; ELECTRICAL SYSTEM. This announcement provides information on Takata Recall Escalated Towing Program.
07-213-22R2024-08-05. Service bulletin. ELECTRICAL SYSTEM. "This bulletin announces a new Genuine Subaru Replacement battery for use in applications where the current SOA821B700 battery is specified."
SubaruNet Announcement2024-07-01. Other. ELECTRICAL 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.
15-305-22R2024-07-01. Service bulletin. ELECTRICAL 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.
15-246-19R2024-07-01. Service bulletin. ENGINE; ELECTRICAL SYSTEM. This Bulletin outlines a new required procedure to follow when performing immobilizer-related repairs.
15-313-23R2024-06-04. Service bulletin. ELECTRICAL SYSTEM. This bulletin contains illustrations of exchange components and their manufacturer as well as a description of the proper exchange procedure.
15-319-242024-06-04. Service bulletin. ELECTRICAL 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.
07-225-24R2024-06-04. Service bulletin. FORWARD COLLISION AVOIDANCE: WARNINGS; 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).
07-225-24R2024-05-02. Service bulletin. EQUIPMENT; LANE DEPARTURE; ELECTRICAL SYSTEM; FORWARD COLLISION AVOIDANCE. 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.
15-311-23R2024-05-02. Service bulletin. EQUIPMENT; 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.
09-117-242024-05-02. Service bulletin. ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING; POWER TRAIN. 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).
07-213-22R2024-04-03. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. This bulletin announces a new Genuine Subaru Replacement battery for use in applications where the current SOA821B700 battery is specified.
7-213-22R2024-04-03. Service bulletin. ELECTRICAL 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."
7-213-22R2024-04-03. Service bulletin. EQUIPMENT; 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."
15-313-23R2024-04-03. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT. The bulletin contains information for exchange components, their manufacturer, as well as the proper exchange procedure.
15-303-22R2024-04-03. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. 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.
15-219-18R2024-04-03. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. This bulletin addresses an error code 202 and or 204 when attempting to complete the STARLINK telematics subsription process.
07-225-242024-04-02. Service bulletin. ELECTRICAL SYSTEM; FORWARD COLLISION AVOIDANCE; EQUIPMENT. "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. "
18-225-22R2024-04-02. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT; EQUIPMENT:ELECTRICAL:INFOTAINMENT. 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.

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.