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Service bulletins for the 2020 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.

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

By type

By component

By trouble code

By topic

Bulletins, newest first
15-240-19R2020-11-05. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. This bulletin announces availability of new Harman audio unit amplifier units with revised internal logic designed to optimize efficiency.
10-19-202020-11-05. Service bulletin. EQUIPMENT. The purpose of this bulletin is to provide a description of current changes to Service Manuals available via the Subaru Technical Information System (STIS) web site.
07-183-202020-11-05. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. This Service Information Bulletin provides corrected and updated procedures to follow when replacing the combination meter assembly.
12-302-202020-11-05. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; SEATS; EQUIPMENT. This bulletin announces a design change made to the front seat backrest frame assemblies in response to a limited number of customer reports of a squeaking sound heard when leaning back in the front seats.
05-78-202020-11-05. Service bulletin. ELECTRICAL SYSTEM; TIRES:PRESSURE MONITORING AND REGULATING SYSTEMS. This Service Information Bulletin announces additional diagnostic procedures for TPMS related DTC C2921 on the applicable models listed.
16-128-20R2020-11-05. Service bulletin. POWER TRAIN; ELECTRICAL SYSTEM. This bulletin announces availability of a new transmission harness for use when diagnosis of DTC P0842 determines the sensor itself is OK but the transmission wiring harness is NG.
18-201-202020-11-05. Service bulletin. EQUIPMENT. The purpose of this bulletin is to provide a desription of current changes to service manuals available via the Subaru Technical Information System (STIS) web site.
07-155-19R2020-11-05. Service bulletin. STRUCTURE:BODY:TAILGATE; ELECTRICAL SYSTEM; LATCHES/LOCKS/LINKAGES. This bulletin replaces TSB 07-143-18R and announces additional changes made to the PRG control module.
Subaru Starlink2020-10-05. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. Update your STARLINK Multimedia Software and Navigation Maps.
Subaru Starlink2020-10-05. Service bulletin. ELECTRICAL SYSTEM. Update for STARLINK Multimedia Software. (with 7-inch or 8-inch display)
18-200-202020-10-05. Service bulletin. EQUIPMENT. This bulletin provides a description of current changes to Service Manuals.
15-240-19R2020-10-05. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. This bulletin announces availability of new Harman audio unit amplifier units with revised internal logic designed to optimized efficiency.
15-255-19R2020-09-04. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT. Map Data Update Procedure for Harman Gen 3.1 Navigation Equipped Head Unts (H/U).
15-271-202020-09-04. Service bulletin. ELECTRICAL SYSTEM. This service information bulletin announces discontinuation of both the "Stitcher" app and the related News Radio feature from the STARLINK app lineup effective 12 midnight on Thursday, September 24, 2020.
15-236-18R2020-09-04. 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 utilized in the models as listed.
06-78-202020-09-04. Service bulletin. SERVICE BRAKES, AIR:DISC:PADS. This bulletin announces availability of new front brake pad kit established to address concerns of a squeaking sound heard when stopping.
14-22-16R2020-09-04. Service bulletin. EQUIPMENT. Special Service Tools Cross Reference List.
15-236-18R2020-08-03. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT. 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 listed.
15-266-202020-08-03. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. This Service Information Bulletin provides helpful procedures and best practices to utilize when customers present with concerns relating to the operation of their Gen 2 Telematics system equipped Subaru.
15-267-202020-08-03. Service bulletin. ELECTRICAL SYSTEM; FORWARD COLLISION AVOIDANCE. This document discusses some of the conditions that may trigger an Automatic Collision Notification (CAN) (Gen1) or Advanced Automatic Collision Notification (AACN) (Gen2), without a collision, airbag deployment, or accident taking place.
15-219-18R2020-08-03. Service bulletin. ELECTRICAL SYSTEM. This Service information bulletin provides Telematics system/generation applicability.
15-195-16R2020-08-03. Service bulletin. ELECTRICAL SYSTEM. This Service Information bulletin provides IMPORTANT information regarding diagnosis and replacement (when applicable) of the STARLINK Telematics Data Communication Module (DMC).
15-249-19R2020-08-03. Service bulletin. EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM(GLOBAL POSITIONING SYSTEM); ELECTRICAL SYSTEM. This bulletin contains inllustrations of exchange components and their manufacturer as well as a description of the proper exchange procedure.
07-177-202020-06-02. Service bulletin. ELECTRICAL SYSTEM. This bulletin announces availability of a new 120V inverter assembly. The new inverter has been developed in response to a limited number of reports describing the overcurrent protection feature triggering at less than the 100W specification.
12-292-202020-06-02. Service bulletin. SEAT BELTS. This service infromation bulletin provides an important precaution to follow whenever installing the front seat belt assembly retaining bolts located at the base of the "B" pillar.

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