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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
01-167-08R2024-08-05. Service bulletin. UNKNOWN OR OTHER. This bulletin contains additional information for recommended materials listed in the Service Manuals for individual models.
09-125-242024-08-05. Service bulletin. ELECTRICAL SYSTEM; ENGINE. This bulletin announces the availability of new reprogramming files for the Engine Control Module (ECM), to address concerns of the starter motor not operating.
05-91-242024-08-05. Service bulletin. SUSPENSION. This Bulletin provides guidance for diagnosing a leaking front or rear suspension strut.
09-120-242024-08-05. Service bulletin. ENGINE; ELECTRICAL SYSTEM. "This bulletin announces availability of new reprograming files for the Engine Control Module (ECM) developed to remedy the following DTCs: P0016, P0017, P0018, P0019, P0087."
18-224-24R2024-08-05. Service bulletin. ELECTRICAL SYSTEM; AIR BAGS. This bulletin announces the service manual correction when diagnosing occupant detection sensor failure.
SubaruNet Announcement2024-07-01. Other. ELECTRICAL SYSTEM. This information announces reprograming file availability for Gen 4.5 Denso CP1.5 Audio and Navigation systems. Inprovement for CarPlay concerns with hands-free calls when the receiving party is not able to hear the caller.
15-246-19R2024-07-01. Service bulletin. ENGINE; ELECTRICAL SYSTEM. This Bulletin outlines a new required procedure to follow when performing immobilizer-related repairs.
06-90-242024-07-01. Service bulletin. SERVICE BRAKES. This bulletin provides diagnosis and procedure information to be applied when diagnosing potential fluid leaks on front and rear brake calipers. This information has been developed to reduce unnecessary brake caliper replacement.
18-224-242024-06-04. Service bulletin. AIR BAGS; ELECTRICAL SYSTEM; SEATS. This Service Information Bulletin announces the Service Manual Correction when diagnosing the following DTCs; B1792: Front Right Occupant Detection Sensor Failure, B1793: Rear Left Occupant Detection Sensor Failure, B1794: Rear Right Occupant Detection Sensor Failure.
15-319-242024-06-04. Service bulletin. ELECTRICAL SYSTEM; ENGINE. This bulletin announces the diagnostic procedures to be followed when encountering cases of the Remote Engine Start (RES) system being the only non-functioning feature with telematics.
09-115-242024-06-04. Service bulletin. ELECTRICAL SYSTEM; ENGINE. This bulletin announces the availability of new oxygen sensors developed to address the following Diagnostic Trouble Codes (DTCs); P0137 (O2 Sensor Circuit Low Voltage Bank 1 Sensor 2, P0138 (O2 Sensor Circuit High Voltage Bank 1 Sensor 2) P0140 (O2 Sensor Circuit No Activity Detected Bank 1 Sensor 2), and P0141 (O2 Sensor Heater Circuit Bank 1 Sensor 2).
09-122-242024-06-04. Service bulletin. ELECTRICAL SYSTEM; FUEL/PROPULSION SYSTEM; ENGINE. This bulletin the announces diagnostic procedures and availability of new Engine Control Module (ECM) reprogramming files to address DTC P2404 (Evap System Leak Detection Pump Sense Circuit Range/Performance) detection.
SubaruNet Announcement2024-06-04. Service campaign. SEATS; ELECTRICAL SYSTEM; AIR BAGS. This is an update for owner notification for Safety recall WRA-24 to replace the ODS sensor replacement.
09-123-242024-06-04. Service bulletin. ENGINE; FUEL/PROPULSION SYSTEM. This bulletin announces the design change made to the high-pressure fuel pump developed to prevent DTC P0087 (Fuel Rail/System Pressure – Too Low Bank 1).
15-270-20R2024-05-02. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. This bulletin provides instruction for use of a new reprogramming procedure to optimize the Denso Gen 4 Audio and Navigation system utilized in the models listed.
09-117-242024-05-02. Service bulletin. ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING; POWER TRAIN. This bulletin announces the availability of new reprogramming files developed to address cases of DTC P0890 (TCM Power Relay Sense Circuit Low) detected by the Engine Control Module (ECM).
09-119-242024-05-02. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING. This bulletin announces the extended warranty coverage for the Thermo Control valve (TCV) used the the models listed. The coverage will be extended to (15) fifteen years / 150,000 miles.
SubaruNet Announ2024-05-02. Service bulletin. AIR BAGS; SEATS; ELECTRICAL SYSTEM. Subaru of America, Inc. has determined that a safety recall for certain 2020-2022 model year Legacy and Outback vehicles to replace all (four) of the Occupant Detection System (ODS) sensors on the front passenger seat.
SubaruNet Announ2024-05-02. Service bulletin. ELECTRICAL SYSTEM; SEATS; AIR BAGS. WRA-24 Subaru Safety Recall Customer Information Sheet.
SubaruNet Announ2024-05-02. Service bulletin. AIR BAGS; ELECTRICAL SYSTEM; SEATS. Owner Contact and Vehicle Disclosure Form.
SubaruNet Announ2024-05-02. Service bulletin. ELECTRICAL SYSTEM; AIR BAGS; SEATS. WRA-24 ODS Sensor Replacement FAQs.
09-80-21R2024-05-02. Service bulletin. EQUIPMENT; ENGINE AND ENGINE COOLING. This bulletin announces availability of a new thermo control valve assembly. The new valve contains an enhanced stainless steel internal shaft for optimized durability along with advanced water proofing for the sensor portion.
07-213-22R2024-04-03. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. This bulletin announces a new Genuine Subaru Replacement battery for use in applications where the current SOA821B700 battery is specified.
7-213-22R2024-04-03. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT. "This bulletin announces a new Genuine Subaru Replacement battery for use in applications where the current SOA821B700 battery is specified. This battery has higher capacity and is slightly larger in dimension."
12-321-21R2024-04-03. Service bulletin. EQUIPMENT; STEERING. This bulletin announces the design change made to the cowl panel. The change was made to address a small number of cases where the rubber sealing portion becomes separated.

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