2018 Subaru Legacy Technical Service Bulletins

445 technical service bulletins (TSBs) are on record for the 2018 Subaru Legacy. 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.

• 10182249Oct 30, 2020Equipment, Electrical system. This bulletin announces availability of new Harman audio unit amplifier units with revised internal logic designed to optimize efficiency.
• 10182247Oct 29, 2020Equipment. 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.
• 10182232Oct 22, 2020Suspension, Steering, Equipment. This bulletin announces availability of new Front Stabilizer Link assemblies equipped with a new dust boot material having enhanced durability and grease retention characteristics.
• 10182223Oct 16, 2020Engine, Equipment, Electrical system. This Service Information Bulletin provides an important step currently missing from the Service Manual diagnostics for DTC B1572 “IMM CIRCUIT EXCEPT ANTENNA CIRCUIT”.
• 10182218Oct 15, 2020Electrical system, Equipment. This bulletin announces the availability of reprogramming files to optimize the control module for the Vehicle Dynamics Control system (VDCCM). DTCs C1531 and/or C1741 may set, the Hill Holder warning lamp and cancellation alarm may activate and/or the VDC warning lamp can illuminate.
• 10182214Oct 13, 2020Tires, Electrical system. This Service Information Bulletin announces additional diagnostic procedures for TPMS related DTC C2921 on the applicable models listed.
• 10182187Oct 2, 2020Equipment. 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.
• 10180737Sep 22, 2020Electrical system, Equipment. Update for STARLINK Multimedia Software and Navigation Maps.
• 10180730Sep 22, 2020Electrical system, Equipment. This bulletin announces availability of new Harman audio unit amplifier units with revised internal logic designed to optimized efficiency.
• 10180733Sep 18, 2020Equipment. This bulletin provides a description of current changes to Service Manuals.
• 10179428Aug 31, 2020Equipment, Electrical system. Map Data Update Procedure for Harman Gen 3.0 Navigation Equipped Head Unts (H/U).
• 10179426Aug 31, 2020Electrical 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.
• 10179424Aug 31, 2020Electrical 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.
• 10179386Aug 17, 2020Electrical system. This bulletin announces reprogramming file availability to optimize the Body Integrated Unit (BIU).
• 10179382Aug 12, 2020Electrical system, Electronic stability control, Brakes. This bulletin announces the availability of reprogramming files to optimize the control module for the Vehicle Dynamics Control system (VDCCM).
• 10179378Aug 4, 2020Equipment. Special Service Tools Cross Reference List.
• 10177828Jul 21, 2020Electrical system. IMPORTANT: This Service Information Bulletin has been removed following Software Version 6 release to the field. Please refer to TSb 15-211-17R for Gen 3.0 and TSB 15-236-18R for Gen 3.1 the update on this condition.
• 10177820Jul 17, 2020Electrical system. This Service information bulletin provides Telematics system/generation applicability.
• 10177826Jul 16, 2020Equipment, 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.
• 10177825Jul 16, 2020Electrical 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.
• 10177819Jul 14, 2020Electrical system. This Service Information bulletin provides IMPORTANT information regarding diagnosis and replacement (when applicable) of the STARLINK Telematics Data Communication Module (DMC).
• 10177817Jul 13, 2020Electrical system, Equipment. This bulletin provides a new reprogramming procedure (FOTA) to optimize the Harman Gen 3.0 Audio and Navigation head units (H/U) utilized in the models listed.
• 10177815Jul 8, 2020Equipment, Electrical system. This bulletin announces availability of new Harman audio unit amplifier units with revised internal logic designed to optimize efficiency while addressing customer concerns.
• 10176013May 12, 2020Electrical system. In the interest of customer satisfation, Subaru of America, Inc. (Subaru) is initiating a service program to update the Harman Kardon head unit on certain vehicles with the latest version of software.
• 10176009May 11, 2020Latches, locks and linkages, Equipment. This bulletin announces availability of reprogramming files to optimize the Body Integrated Unit (BIU) opertation of the automatic door lock (auto-lock/unlock) feature.
• 10175989May 6, 2020Engine cooling, Electrical system. This bulletin announces the availability of reprogramming files to optimize the Engine Control Module (ECM) for hard starting in sub-freezing temperatures, DTC P0400, and surging in high altitudes.
• 10174543Apr 30, 2020Equipment. All Models (Vehicle Cleaning- COVID-19Best Practices)
• 10174537Apr 30, 2020Equipment, Electrical system. This service information bulletin provides important information regarding diagnosis and replacement (when applicable) of the STARLINK Telematics Data Communication Module (DCM). All models with STARLINK Telematics System.
• 10174540Apr 24, 2020Engine cooling, Electrical system. This bulletin announces the availability of reprogramming files to optimize the Engine Control Module (ECM).
• 10174538Apr 23, 2020Electrical system. In the intrest of customer satisfaction, Subaru of America, Inc. (SOA) is extending the New Car Limited Warranty for the listed models and model years equipped with a Harman Gen. 3.0 Audio and Navigation head unit.
• 10174510Apr 17, 2020Electrical system, Latches, locks and linkages, Equipment. This bulletin announces availability of reprogramming files to optimize the Body Integrated Unit (BIU) operation of the automatic door lock (auto-lock / unlock) feature.
• 10173195Mar 31, 2020Electrical system, Equipment. This bulletin announces availability of new Harman audio unit amplifier units with revised internal logic designed to optimize effciency while addressing customer concerns.
• 10173190Mar 26, 2020Electrical system, Equipment. This service bulletin announces the addition of diagnostics for DTC B224C: RADIO ANTENNA FAULTS to the service manuals of the models listed.
• 10173186Mar 26, 2020Equipment, Electrical system. This service bulletin provides details of a correction to the diagnostic procedure for DTC B2350- REAR RADAR COMMUNICATION ERROR on the models listed.
• 10173135Mar 20, 2020Electrical system, Body and structure, Latches, locks and linkages. This Service Information Bulletin provides insight on how to address a customer concern of the rear hatch, Power Rear Gate (PRG) or trunk release operating (or finding the PRG/trunk open unexpectedly after parking) without a specific input (button press) from the operator.
• 10173127Mar 19, 2020Electrical system, Air bags, Equipment. This bulletin provides information regarding Event Data Recorder (EDR) functionality which has been incorporated into the airbag system.
• 10173114Mar 6, 2020Electrical system. This Service Information Bulletin is in response to several battery sensor replacements resulting from improper removal and/or installation practices.
• 10173027Mar 3, 2020Engine cooling, Equipment, Electrical system. 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.
• 10171925Feb 27, 2020Engine cooling, Electrical system. This bulletin announces the availability of reprogramming files to optimize the Engine Control Module (ECM).
• 10171942Feb 21, 2020Equipment. This bulletin announces availability of reprogramming files to optimize the Body Integrated Unit (BIU) operation of the automatic door lock (auto-lock / unlock) feature.
• 10171928Feb 19, 2020Electrical system. The following information addresses reprogramming file availability and a software update installation procedure to provide optimization to the Harman Gen 3 Audio and Navigation head units utilized in the models as listed.
• 10171923Feb 12, 2020Electrical system, Equipment. This bulletin contains illustrations of exchange components and their manufacturer as well as a description of the proper exchange procedure.
• 10171105Jan 31, 2020Visibility (wipers, defrost, mirrors), Electrical system, Equipment. This bulletin announces availability of new power window switch assemblies.
• 10171094Jan 28, 2020Electrical system, Equipment. The first TomTom map update for Gen 3.0 Harman navigation equipped vehicles was made available.
• 10171093Jan 28, 2020Equipment, Electrical system. This bulletin provides a new reprogramming procedure (FOTA) to optimize the Harman Gen 3 Audio and Navigation head units (H/U) utilized in the models
• 10171089Jan 17, 2020Equipment, Air bags, Electrical system. This Bulletin provides information regarding Event Data Recorder (EDR) functionality which has been incorporated into the airbag system.
• 10171082Jan 10, 2020Electrical system. This announcement is in regards to the class action lawsuit regarding Harman Gen 3.0 Audio and Audio/ Navigation Head Units in certain Subaru vehicles.
• 10171073Jan 3, 2020Equipment, Electrical system. The following information addresses reprogramming file availability and a software update installation procedure to provide optimization to the Harman Gen 3 Audio and Navigation head units.
• 10169845Dec 20, 2019Equipment. This bulletin contains illustrations of exchange components and their manufacturer as well as a description of the proper exchange procedure. The exchange program policy can also be found in Sections 8.4.9 and 11.2.10 of your Claims Policies and Procedures Manual found in Subarunet.
• 10169858Dec 5, 2019Air bags. "This Service Information Bulletin announces IMPORTANT changes to the parts ordering and Service Procedures for replacement passenger airbag modules and airbag control modules used in the models listed above. The change is due to discontinuation of the original equipment passenger airbag module assemblies used in 2015-17MY vehicles. The replacement passenger airbag module assemblies for the 2015-17 MY Legacy and…

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