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Service bulletins for the 2019 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.

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

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

Bulletins, newest first
15-251-19R2022-01-04. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides additional diagnostics to follow when addressing a Telematics-related DTC B2A16.
15-240-19R2022-01-04. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. This bulletin announces availability of new Harman audio unit amplifier units with revised internal logic designed to optimize efficiency.
15-255-19R2022-01-04. Service bulletin. ELECTRICAL SYSTEM. Map Data Update Procedure for Harman Gen 3.1 Navigation Equipped Head Units.
15-236-18R2022-01-04. Service bulletin. 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.
15-251-19R2021-11-02. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides additional diagnostics to follow when addressing a Telematics-related DTC B2A16.
16-103-16R2021-11-02. Service bulletin. ELECTRICAL SYSTEM; POWER TRAIN. This bulletin has been developed in response to a small number of customer concerns regarding fluid seepage found coming from the CVT assembly.
WUW-08R2021-11-02. Service bulletin. ELECTRICAL SYSTEM. Subaru of America, Inc. (Subaru) is initiating a new safety recall for certain 2019 model year Ascent, Forester, and Crosstrek Hybrid vehicles in which the Positive Crankcase Ventilation (PCV) valve may be defective.
15-287-212021-11-02. Service bulletin. ELECTRICAL SYSTEM. This bulletin announces the availability of diagnostic information regarding accessory remote engine start systems.
SubaruNet Announ2021-11-02. Service bulletin. ELECTRICAL SYSTEM. Effective today (October 1, 2021), the recommended replacement battery for the 19-21 MY Ascent models is changing from the SOA821B200 Flooded Battery to the SOA821B600 Enhanced Flooded Battery (EFB).
15-195-16R2021-10-04. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. This bulletin provides important information regarding diagnosis and replacement (when applicable) of the STARLINK Telematics Data Communication Module (DCM) along with a new claim submission requirement.
15-236-18R2021-10-04. Service bulletin. EQUIPMENT; 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.
15-240-19R2021-10-04. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT. This bulletin announces availability of new Harman audio unit amplifier units with revised internal logic designed to optimize efficiency while addressing customer concerns.
07-199-21R2021-10-04. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides additional information for the diagnostic procedures concerning measurement of dark current (a.k.a. standby current).
07-198-212021-09-04. Service bulletin. ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM. This bulletin announces availability of new starter motors and ECM reprogramming files created to address some reports of excessive noise while cranking the engine.
07-199-21R2021-09-04. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT. This bulletin provides additional information for the diagnostic procedures concerning measurement of dark current (standby current).
15-236-18R2021-08-05. Service bulletin. 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.
07-199-212021-08-05. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides additional information for the diagnostic procedures concerning measurement of Dark Current (a.k.a. Standby Current).
15-236-18R2021-07-03. Service bulletin. 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.
01-167-08R2021-07-03. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT. This bulletin contains additional information for recommended materials listed in the Service Manuals for individual models
TechTips2021-07-03. Service bulletin. EQUIPMENT; ELECTRONIC STABILITY CONTROL:AUTOMATIC (ASC); ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING. Subaru Service and technical support line newletter QMR of the Month.
07-195-212021-07-03. Service bulletin. LATCHES/LOCKS/LINKAGES; ELECTRICAL SYSTEM. This bulletin outlines changes in the service procedure for replacement of the Power Rear Gate control module.
05-85-21R2021-05-05. Service bulletin. ELECTRICAL SYSTEM; WHEELS. This bulletin announces a design change made to the TPMS valve assemblies.
15-282-21R2021-05-04. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides additional procedures and a detailed flow chart to use when diagnosing customer concerns regarding operation of the STARLINK RES feature.
Subarunet Announ2021-04-02. Service bulletin. ELECTRICAL SYSTEM. In January 2021, the replacement battery application for all Ascent and 2017- 2021 Impreza models were changed from part number SOA821B200 to part number SOA821B600.
Subarunet Announ2021-03-04. Service bulletin. ELECTRICAL SYSTEM. SOA821B600 Battery Supersession

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