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Service bulletins for the 2020 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.

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

By type

By component

By trouble code

Bulletins, newest first
15-246-19R2023-01-05. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. This Service Information Bulletin outlines a new required procedure to follow when performing immobilizer-related repairs.
WRK-21/222023-01-05. Service bulletin. POWER TRAIN. "Subaru of America, Inc. (Subaru) has initiated this safety and emissions Recall for certain 2019 - 2020 model year Ascent vehicles, 2020-2021 model year turbo Legacy vehicles, and 2020-2021 model year turbo Outback vehicles in which the Continuously Variable Transmission (CVT) chain may slip and/or break."
07-213-22R2023-01-05. Service bulletin. ELECTRICAL SYSTEM. This bulletin announces a new Genuine Subaru Replacement battery for use in applications where the current SOA821B700 battery is specified.
16-132-20R2022-12-02. Service bulletin. POWER TRAIN. This Bulletin provides updated diagnostic procedures to follow and a brief questionnaire to complete when diagnosing an alleged Chain Slip condition on the TR580 and TR690 model CVT transmissions used in the models listed.
07-184-20R2022-12-02. Service bulletin. ELECTRICAL SYSTEM. This bulletin announces a design change made to the power window main switches used in the models listed.
15-240-19R2022-12-02. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. This bulletin announces availability of new Harman audio unit amplifier units with revised internal logic designed to optimize efficiency while addressin customer concerns.
07-213-22R2022-12-02. Service bulletin. ELECTRICAL SYSTEM. This bulletin announces a new Genuine Subaru Replacement battery for use in applications where the current SOA821B700 battery is specified.
Subarunet Announ2022-12-02. Service bulletin. POWER TRAIN. This communication announces a new procedure for retailers to follow in the event their WRK-21 videoscope requires service or replacement.
15-282-21R2022-12-01. Service bulletin. EQUIPMENT; 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.
07-207-22R2022-12-01. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. In the interest of customer satisfaction, Subaru of America, Inc. is extending the New Car Basic Warranty coverage for the 12 Volt batteries used in the above listed models and model years beyond the original three (3) years or thirty six thousand miles (36,000), whichever comes first.
15-261-20R2022-11-03. Service bulletin. EQUIPMENT; 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 utilized in the models listed.
SubaruNet Announ2022-11-03. Service bulletin. POWER TRAIN. UPDATE: Subaru Safety & Emissions Recall: WRK-21 – CVT Chain Guide Breakage.
15-251-19R2022-11-03. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. This Bulletin provides additional diagnostics to follow when addressing a Telematics-related DTC B2A16.
15-246-19R2022-11-03. Service bulletin. ELECTRICAL SYSTEM. This Bulletin outlines a new required procedure to follow when performing immobilizer-related repairs.
SubaruNet Announ2022-11-03. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT. A Firmware Over the Air (FOTA) software update is available for our customers with a Gen 4 head unit.
07-207-22R2022-11-03. Service bulletin. ELECTRICAL SYSTEM. Subaru Battery Drain Product Liability Litigation.
07-178-21R2022-11-03. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. This bulletin is being released as guidance for proper testing and charging of vehicle batteries.
WRK-21/22R2022-11-03. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL; POWER TRAIN. Subaru of America, Inc. (Subaru) has initiated this safety and emissions Recall for certain 2019 -2020 model year Ascent vehicles, 2020-2021 model year turbo Legacy vehicles, and 2020-2021 model year turbo Outback vehicles in which the Continuously Variable Transmission (CVT) chain may slip and/or break.
WRK-21/22R2022-10-04. Service bulletin. POWER TRAIN. Subaru of America, Inc. (Subaru) has initiated this safety and emissions Recall for certain 2019 - 2020 model year Ascent vehicles, 2020-2021 model year turbo Legacy vehicles, and 2020-2021 model year turbo Outback vehicles in which the Continuously Variable Transmission (CVT) chain may slip and/or break.
09-74-21R2022-10-04. 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.
SubaruNet Announ2022-10-04. Service bulletin. ELECTRICAL SYSTEM; ELECTRICAL SYSTEM:12V/24V/48V BATTERY. Battery Class Action Settlement Resources. (2)
03-90-222022-10-04. Service bulletin. ELECTRICAL SYSTEM; ELECTRONIC STABILITY CONTROL:AUTOMATIC (ASC). This bulletin announces availability of new Vehicle Dynamics Control (VDC) reprograming files.
SubaruNet Announ2022-10-04. Service bulletin. POWER TRAIN. An announcment regarding final phase of customer mailing for recall WRK 21.
09-80-21R2022-10-04. Service bulletin. ENGINE AND ENGINE COOLING; EQUIPMENT. This bulletin announces availability of a new thermo control valve assembly.
16-136-22R2022-10-04. Service bulletin. POWER TRAIN. This service bulletin provides a temporary repair procedure to address vibrations and/or judder concerns experienced on turns during acceleration.

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