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Service bulletins for the 2021 Subaru Legacy

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.

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

By type

By component

By trouble code

Bulletins, newest first
Subarunet Announ2021-08-05. Service bulletin. ENGINE AND ENGINE COOLING. "Subaru of America, Inc. (Subaru) is initiating a new voluntary emissions recall for certain 2021 model year Ascent, Legacy, and Outback vehicles equipped with a 2.4L turbo engine. "
09-76-212021-08-05. Service bulletin. ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM. This bulletin announces the availability of NEW reprogramming files to correct a starting condition which may occur during ambient temperatures (10 degrees Fahrenheit and lower) or in high altitude conditions.
WRF-212021-08-05. Service bulletin. ENGINE AND ENGINE COOLING. Subaru of America, Inc. (Subaru) is initiating a voluntary emissions recall for certain 2021 model year Ascent, Legacy, and Outback vehicles equipped with a 2.4L turbo engine, which may have damaged terminals on the engine wire harness.
16-132-20R2021-08-04. Service bulletin. POWER TRAIN. Diagnostic Information for Alleged Chain Slip Condition on TR580 / TR690 Transmissions.
15-261-20R2021-08-04. Service bulletin. ELECTRICAL SYSTEM. The following information announces reprogramming file availability and provides a software update installation procedure to optimize the new Gen 4 Denso CP1 Audio and Navigation head units.
15-246-19R2021-07-03. Service bulletin. ELECTRICAL SYSTEM. This bulletin outlines a new required procedure to follow when performing immobilizer-related repairs on the 2020-22 Legacy and Outback
09-74-21R2021-07-03. Service bulletin. ENGINE AND ENGINE COOLING. This bulletin provides updated parts information and a service procedure to follow for removing accumulated carbon deposits from fuel injectors and internal engine components (e.g. intake valves and / or manifold, and combustion chambers).
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
09-51-08R2021-07-03. Service bulletin. ENGINE AND ENGINE COOLING; EQUIPMENT. This bulletin is to advise of SOA’s revised catalytic converter recycling program shipping procedure.
02-187-212021-07-02. Service bulletin. ENGINE AND ENGINE COOLING. This bulletin outlines changes in the service procedure for engine oil pressure inspection.
02-186-212021-06-03. Service bulletin. ENGINE AND ENGINE COOLING. This bulletin outlines changes in the service procedure for scavenge pump assembly installation.
09-74-21R2021-06-02. Service bulletin. ENGINE AND ENGINE COOLING. This bulletin provides updated parts information and a service procedure to follow for removing accumulated carbon deposits from fuel injectors and internal engine components.
15-246-19R2021-06-02. Service bulletin. ELECTRICAL SYSTEM. This bulletin outlines a new required procedure to follow when performing immobilizer-related repairs.
18-206-212021-06-02. Service bulletin. EQUIPMENT. Description of current changes to Service Manuals available via the Subaru Technical Information System (STIS) web site.
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.
15-240-19R2021-05-04. Service bulletin. EQUIPMENT. This bulletin announces availability of new audio unit amplifier units with revised internal logic designed to optimize efficiency.
WRI-20R2021-05-04. Service bulletin. ELECTRICAL SYSTEM. In the interest of customer satisfaction, Subaru of America, Inc. (Subaru) is initiating a Service Program for certain 2020-2021 model year Legacy and Outback vehicles to update the Cockpit Control Module (CCM) software to the latest version.
15-272-20R2021-05-04. Service bulletin. EQUIPMENT. This bulletin contains illustrations of exchange components and their manufacturer as well as a description of the proper exchange procedure.
12-317-212021-04-02. Service bulletin. EQUIPMENT. This bulletin announces a change to the mat located in the inside tray of the center console box lid to address concerns of shrinking and deformation.
12-314-212021-03-05. Service bulletin. STRUCTURE; EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY. This bulletin announces availability of new weatherstrips designed to eliminate a squeaking / chirp-type sound heard when closing the front doors.
12-313-212021-03-05. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; STRUCTURE; EQUIPMENT. This bulletin announces changes made to the rear door weatherstrip to optimize their water sealing performance.
05-84-212021-03-04. Service bulletin. EQUIPMENT. This bulletin announces availability of new front wheel hub assemblies incorporating bearing surfaces having increased resistance to imperfections resulting from shock loads.
15-277-212021-03-04. Service bulletin. EQUIPMENT; EQUIPMENT:RECREATIONAL VEHICLE/TRAILER:120/240 VAC ELECTRICAL SYSTEM:GFCI/AFCI; ELECTRICAL SYSTEM. This bulletin provides the procedure which must be followed to properly register the Map Update Request Code assigned to the exchange CCU with the Subaru Map Update web portal.
14-27-212021-03-04. Service bulletin. ENGINE; EQUIPMENT. This bulletin announces the upcoming issuance to all retailers of an essential tool update kit for the Engine Support Assembly Kit #J-50135-A.

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