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Service bulletins for the 2004 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.

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

By type

By component

By trouble code

Only bulletins with component: Engine are shown. Show all

Bulletins, newest first
15-300-22R2026-02-02. Service bulletin. ELECTRICAL SYSTEM; ENGINE. This Bulletin provides the diagnostic procedure for the STARLINK® Remote Engine Start (RES).
18-226-25R2026-01-06. Service bulletin. ELECTRICAL SYSTEM; ENGINE. This Service Information Bulletin provides the Service Manual Correction to the diagnostic procedure for DTC B2A16 (Immobilizer Key Collation Diagnosis).
Subaru Service Technical2025-09-02. Other. ENGINE; ELECTRICAL SYSTEM; POWER TRAIN. Subaru Service Technical Support Newsletter special edition.
02-192-24R2025-05-01. Service bulletin. ENGINE. This Bulletin announces the diagnostic procedures to be followed when diagnosing engine oil leakage on FA and FB type engines.
09-51-08R2025-04-01. Service bulletin. ENGINE. The purpose of this bulletin is to advise of SOA’s revised Catalytic Converter Recycling Program shipping procedure.
01-167-08R2024-10-02. Service bulletin. ENGINE; ELECTRICAL SYSTEM. This bulletin contains additional information for recommended materials listed in the Service Manuals for individual models.
02-192-242024-10-02. Service bulletin. ENGINE. This Service Information Bulletin announces the diagnostic procedures to be followed when diagnosing engine oil leakage on FA and FB type engines.
02-191-22R2024-10-02. Service bulletin. ENGINE. This bulletin announces availability of the NEW genuine Subaru engine oil filter.
01-168-09R2024-09-04. Service bulletin. ELECTRICAL SYSTEM; ENGINE. The purpose of this bulletin is to provide replacement key and immobilizer information along with an overview of the Subaru Lock Information web-site.
Thermo Control Valve Vide2024-08-05. Other. ENGINE. This thermo control valve video contains information on the replacement of thermo control valve.
037012R2023-05-08. Service bulletin. ENGINE. Repair Procedure for High-Pitched Sound
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.
03-82-18R2021-02-01. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; ENGINE AND ENGINE COOLING; POWER TRAIN:CLUTCH ASSEMBLY; EQUIPMENT. This bulletin announces a design change to the clutch release bearing.
03-82-18R2020-09-04. Service bulletin. ENGINE AND ENGINE COOLING. This service information bulletin announces a design change to the clutch release bearing used on the models listed.
02-172-18R2018-06-11. Service bulletin. ENGINE; EQUIPMENT. This bulletin provides details regarding a new oil filler tube o-ring developed to address engine oil seepage concerns. This seepage may accumulate along the bottom sealing surface of the rocker cover. The new o-ring utilizes material which has an increased resistance to engine heat.
02-172-18R2018-06-11. Service bulletin. ENGINE. This bulletin provides details regarding a new oil filler tube o-ring developed to address engine oil seepage concerns. This seepage may accumulate along the bottom sealing surface of the rocker cover. The new o-ring utilizes material which has an increased resistance to engine heat.
1180062006-12-28. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. THROTTLE POSITION SENSOR. VEHICLES EQUIPED WITH H-6 3.0L ENGINES. *KB
082006-07-25. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. ECM REPROGRAMMING SERVICE PROGRAM. *TT
022006-03-10. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:BELTS AND ASSOCIATED PULLEYS. RUBBING MARK ON TIMING BELT. SUBARU. *TT
112005-12-22. Service bulletin. ENGINE AND ENGINE COOLING. DIAGNOSTIC TROUBLE CODE P0171 - CHECK FOR A LOOSE VACUUM CONNECTION ON THE SMALL BLUE VACUUM T FITTING FOUND UNDER THE INTERCOOLER. SUBARU TECHTIPS. *TT
0296052005-10-13. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. 2.5L REMANUFACTURED SOHC SHORT BLOCK RELEASE. *TT
090120032005-09-14. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. ROUGH IDLE/CHECK ENGINE LIGHT AFTER BATTERY DISCONNECT. *SC

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