2020 Subaru Legacy Technical Service Bulletins

595 technical service bulletins (TSBs) are on record for the 2020 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.

• 10171925Feb 27, 2020Engine cooling, Electrical system. This bulletin announces the availability of reprogramming files to optimize the Engine Control Module (ECM).
• 10171944Feb 21, 2020Electrical system, Equipment. This Service Information bulletin informs of an upcoming correction to the Service Manual involving Gear Position shown in Freeze-Frame Data acquired during Engine diagnosis.
• 10171939Feb 21, 2020Equipment. This bulletin details an important regulation issued by the National Highway Traffic Safety Administration (NHTSA) which impacts the way some vehicles with accessories are sold. This regulation applies to any automobile retailer installing accessories on a vehicle prior to its first sale.
• 10171933Feb 19, 2020Electrical system, Equipment. This bulletin provides helpful tips to use when diagnosing customer concerns which may arise when operating the new-generation Denso CP1 Multimedia Navigation (AVN) & Display Audio (DA) systems.
• 10171106Jan 31, 2020Equipment. This bulletin provides a procedure to address a limited number of customer concerns regarding a visible gap between the A-Pillar trim panel and the head liner.
• 10171083Jan 28, 2020Equipment, Electrical system, Forward collision avoidance. This Service Information Bulletin describes how to proceed when doing EyeSight (Version 3) system diagnosis.
• 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.
• 10169850Dec 23, 2019Electrical system. This Service Information Bulletin outlines a new required procedure to follow when performing immobilizer-related repairs on the all-new 2020 Legacy and Outback. To further enhance vehicle security, this new procedure requires connection to a secure SBR server for authentication and to access immobilizer information. An 8-digit “Authentication Key” supplied by SBR will be a required input when working with SSM4.
• 10169846Dec 20, 2019Electrical system. Subaru Service and Technical Support Line Newsletter.
• 10169825Dec 20, 2019Electrical system. 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.
• 10169877Dec 13, 2019Engine, Electrical system. In the interest of customer satisfaction, Subaru of America, Inc. (Subaru) is initiating a Service Program to reprogram the Engine Control Module (ECM) on certain 2019-2020MY Ascent and 2020MY Legacy & Outback vehicles. In some vehicles, the current software may cause the sub learning value control to operate improperly during the wake-up mode of the ECM. This could cause repeated erroneous learning of the…
• 10169869Dec 11, 2019Electrical system. "In the interest of customer satisfaction, Subaru of America, Inc. (Subaru) is initiating a Service Program to reprogram the Engine Control Module (ECM) on certain 2019-2020MY Ascent and 2020MY Legacy & Outback vehicles. In some vehicles, the current software may cause the sub learning value control to operate improperly during the wake-up mode of the ECM. This could cause repeated erroneous learning of the…
• 10169872Dec 10, 2019Engine cooling. WUU-06 ECM Reprogramming for DTC C1424 Customer Satisfaction Service Program.
• 10169829Dec 3, 2019Electrical system. This Service Information Bulletin involves DTC U0254 “Lost Communication with Remote Control Module”. The DTC will be stored in memory when performing an all systems DTC check on vehicles equipped with the Genuine Subaru accessory Remote Engine Starter (RES) p.n. H001SAN000 or H001SAN100.
• 10169828Dec 3, 2019Engine cooling. This Service Information Bulletin provides the proper tightening / torque sequence to follow when installing Intake Duct #3 onto the intercooler assembly. Following the sequence below will insure the bolts remain fully tightened.
• 10169826Dec 2, 2019Electrical system, Equipment. Announcement of the QMR of the month winner.
• 10168637Nov 18, 2019Equipment, Electrical system. "This Service Bulletin provides additional diagnostics to follow when addressing a Telematics-related DTC B2A16. In most cases involving this DTC, the following scenario(s) occur: • When trying to use the remote engine starter (RES) feature through Telematics (STARLINK / My Subaru app) the request is unsuccessful and the red Telematics indicator lamp illuminates. • The customer takes their vehicle to the…
• 10168623Nov 11, 2019Equipment, Electrical system. This Service Information Bulletin provides insight in response to both customer and retailer feedback resulting from the use of OBD-II port connected devices. These devices are often employed by insurance companies to monitor driver activity for premium calculations (premium discounts). Commonly referred to as discount tools, driver monitors or dongles, the use of these devices can interfere with normal STARLINK…
• 10168621Nov 11, 2019Equipment, Electrical system. The all-new 2020 Outback/Legacy line has adopted a new Gen4 infotainment system to support the audio/navigation features. Also referred to as Cockpit Gen1 (CP1), it is manufactured by Denso and consists of two modules: a Cockpit Control Unit (CCU) and a dual 7” display Audio unit or a 11.6” Audio/Navigation display system also known as the Center Information Display (CID).
• 10166921Oct 21, 2019Engine cooling. This Service Information Bulletin outlines design changes made to the TR580 CVT oil pan assembly. The changes are as follows: • The CVT oil pan material has been changed from steel to aluminum. • The new aluminum pan has a new, larger diameter drain plug and drain plug gasket. • The new aluminum pan will be sold as a set consisting of: oil pan, drain plug and drain plug gasket.
• 10166918Oct 21, 2019Electrical system. 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.
• 10166903Oct 11, 2019Electrical system. This Service Information Bulletin provides the procedure for programming the RES fobs used with the H001SAN100 Remote Engine Starter accessory installed on (turn) Key Start -equipped vehicles. Use this procedure whenever programming (or re-programming) a fob is needed.
• 10166902Oct 11, 2019Transmission and drivetrain. This Service Information Bulletin outlines design changes made to the coolant hoses for the CVT fluid cooler and the spring-type clamps used to secure them.
• 10166882Oct 1, 2019Electrical system. This Service Information Bulletin provides the procedures for programing the RES fobs used with the H001SAN100 Remote Engine Starter accessory installed on (turn) Key Start-equipped vehicles. Use this procedure whenever programming (or re-programming) a fob is needed.
• 10165503Sep 27, 2019Brakes. Subaru of America, Inc. (Subaru) is recalling certain 2020 model year Legacy and Outback vehicles in which the brake pedal mounting bracket may have an insufficiently tightened or missing bolt. A total of 3,450 U.S. vehicles will be affected by this recall. The repair will involve an inspection of the suspect bolts in all potentially affected vehicles and replacement of the brake pedal assembly only if determined…
• 10165548Sep 26, 2019Electrical system. This Service Information Bulletin provides additional diagnostics to follow when addressing a Telematics-related DTC B2A16. In most cases involving this DTC, the following scenario(s) occur: • When trying to use the remote engine starter (RES) feature through Telematics (STARLINK / My Subaru app) the request is unsuccessful and the red Telematics indicator lamp illuminates.
• 10165546Sep 26, 2019Electrical system. This Service Information Bulletin provides a procedure for removing what appears like a lattice pattern on the display screens of the dual 7.0-inch audio unit. The pattern shown below results from natural oils in the skin adhering to small amounts of glue residue left behind after the touch screen protective films are removed.
• 10165518Sep 25, 2019Brakes. Subaru of America, Inc. (Subaru) is recalling certain 2020 model year Legacy and Outback vehicles in which the brake pedal mounting bracket may have an insufficiently tightened or missing bolt. Over time, if this condition exists, the brake pedal mounting area may deform. Deformation of the brake pedal mounting area could reduce braking performance, increasing the risk of a crash. A total of 3,450 U.S. vehicles…
• 10165507Sep 18, 2019Electrical system, Equipment. 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.
• 10165506Sep 17, 2019Electrical system. This Service Information Bulletin outlines a new required procedure to follow when performing immobilizer-related repairs on the all-new 2020 Legacy and Outback. To further enhance vehicle security, this new procedure requires connection to a secure SBR server for authentication and to access immobilizer information. An 8-digit “Authentication Key” supplied by SBR will be a required input when working with SSM4.
• 10165502Sep 11, 2019Brakes. Subaru of America, Inc. (Subaru) is recalling certain 2020 model year Legacy and Outback vehicles in which the brake pedal mounting bracket may have an insufficiently tightened or missing bolt. A total of 3,450 U.S. vehicles will be affected by this recall. The repair will involve an inspection of the suspect bolts in all potentially affected vehicles and replacement of the brake pedal assembly only if determined…
• 10165498Sep 4, 2019Electrical system. Subaru service and technical support line news letter.
• 10165513Sep 3, 2019Equipment. A Special SBR Quality Monitoring Team is currently in the USA monitoring the launch of these much-anticipated new models. The Team is very interested in EVERYTHING related to these new vehicles. They are looking for specific and detailed information on EVERY condition identified. Naturally, this includes any and all repairs performed. It also includes cases when a customer comments on a function or condition…
• 10164191Aug 15, 2019Electrical system. "This Service Information Bulletin outlines a new required procedure to follow when performing immobilizer-related repairs on the all-new 2020 Legacy and Outback. To further enhance vehicle security, this new procedure requires connection to a secure SBR server for authentication and to access immobilizer information. An 8-digit “Authentication Key” supplied by SBR will be a required input when working with SSM4.
• 10182589Aug 12, 2016Equipment, Engine. This Service Information bulletin provides new inspection and repair procedures for AVCS (Active Valve Control System) -related DTCs on the FA and FB engine equipped models listed above. The applicable Service Manuals will be revised with this new information in the near future.
• 10232535Jul 17, 2014Electrical system. Replacement Key and Immobilizer Info
• 10234841May 20, 2014Other or unknown, Air bags, Equipment. Event Data Recorder (EDR) Function of Airbag Module
• 10232894Mar 7, 2014Engine cooling. Effective with all 2015 model year cars and forward, the oil change interval is changing to 6,000 miles or 6 months, whichever comes first.
• 10232550Aug 5, 2013Visibility (wipers, defrost, mirrors). EyeSight Acceptable Windshield Repair Areas
• 10232549Aug 5, 2013Equipment. ETC (Electronic Toll Collection) Device Mounting Guidelines
• 10234845May 22, 2013Visibility (wipers, defrost, mirrors). If you encounter a customer complaint of a white residue build up on the rear door partition glass or interior molding, it may be crystallized salt.
• 10233119Apr 25, 2013Engine cooling. Oil Filler Cap Gasket Coming Unseated
• 10233445Mar 14, 2013Equipment. If you have copies of 12-135-12R please discard and refer to 07-72-13 for the latest repair procedure.
• 10232869Feb 19, 2013Other or unknown, Equipment. Puddle Light Recall
• 10234259Dec 11, 2012Equipment. 6MT Transfer Driven Gear Bearing

← All problems reported for the 2020 Subaru Legacy