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Service bulletins for the 2015 Subaru WRX

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.

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

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Only bulletins with component: Engine are shown. Show all

Bulletins, newest first
WQW-58R2018-04-02. Service bulletin. ENGINE AND ENGINE COOLING. Subaru of America, Inc. has determined that vehicles affected by this Service Program require ECM reprogramming. This bulletin includes the service procedure for diagnosis and repair of customer concerns involving engine idle roughness or, in some cases, engine noise and/or damage resulting from spark knock (pre-ignition). The Engine Control Module logic has also been optimized requiring the ECM reprogramming. The new logic optimizes the ECM for control of the following parameters: * Change to Fuel Cut control when fuel level is extremely low / near empty * Change to improve idle smoothness / quality * Change to boost pressure control under wide-open throttle (WOT) conditions. Under certain high engine load driving conditions, spark knock can occur which results in elevated cylinder temperatures and pressures. Over time, excessive erosion of the spark plugs and possible damage to the pistons can be consequences of continued operation with these conditions present.
02-170-172018-04-02. Service bulletin. ENGINE AND ENGINE COOLING. This bulletin announces part information for new Active Valve Control System (AVCS) oil control solenoid valves (OCV) which contain a redesigned internal oil seal. The new seal will eliminate potential oil seepage into the wire harness connector portion of the valve. If oil seeps into the connector, over time, the Check Engine lamp may illuminate and set various AVCS-related DTCs.
11-167-162017-10-27. Service bulletin. ELECTRICAL SYSTEM; ENGINE. This bulletin announces the availability of reprogramming files to optimize the ECM. These new files will address customer concerns of Check Engine light illumination resulting from DTC P2270 being stored in the ECM memory.
10-84-16R2017-10-27. Service bulletin. ENGINE AND ENGINE COOLING; POWER TRAIN:CLUTCH ASSEMBLY; ELECTRICAL SYSTEM. This bulletin announces the availability of a new Air Conditioning compressor / clutch assembly to address customer concerns of the system not operating. Electrical windings located inside the clutch assembly have been changed to eliminate the condition. The service procedure will involve replacement of the A/C compressor and clutch as a complete assembly.
11-161-162017-10-27. Service bulletin. ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING. This bulletin announces the availability of new reprogramming files for optimizing the ECM to address the following customer concern: ? Rough idle after a warm engine restart. In rare cases, DTC P0300 may also be stored.
ERSV2017-10-27. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL. This is to advise that the Subaru Claim System has been updated to accept claims for Emission repairs on vehicles with a salvage title. This coverage applies to all emission repairs within the warranty coverage period. Valid claims for salvage vehicles are Recalls, SAS Maintenance, and Warranty for Emission repairs only. Please make a note of this important system enhancement. Questions may be directed to the Subaru Claims helpline at 1866SUBARU2 (18667822782).
WQW582017-10-27. Service bulletin. ELECTRICAL SYSTEM; ENGINE. Subaru of America, Inc. has initiated a Service Program to reprogram the Engine Control Module (ECM) on certain 2015 model year WRX vehicles and certain 2014 and 2015 model year 2.0XT Forester vehicles equipped with a 2.0 liter turbocharged engine, to address a possible pre?ignition issue.
02-168-172017-09-14. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:BELTS AND ASSOCIATED PULLEYS; ENGINE. This Service Information bulletin announces a material change to the engine accessory drive / v-belt made to address customer concerns of a slipping belt (squeal or chirping) sound.
02-166-17R2017-09-14. Service bulletin. ENGINE AND ENGINE COOLING. This bulletin outlines design changes made to the upper oil pan assembly on FA and FB engines used on the models listed above. There have been isolated cases where the sealer used between the upper oil pan and the crankcase has become displaced resulting in engine oil seepage. Revisions made to the upper oil pan casting: * The mating flange thickness of the casting in the area identified as the cause for the seepage has been increased by 5.5mm. (See images provided in the Parts Information section below.) This thickness increase creates the need for a longer bolt to provide proper tightening and retention. * An additional mounting point has been added to the ribbing inside the casting to increase retention of the steel baffle plate and eliminate vibration.
02-166-172017-08-14. Service bulletin. ENGINE AND ENGINE COOLING. This bulletin outlines design changes made to the upper oil pan assembly on FA and FB engines used on the models listed above. There have been isolated cases where the sealer used between the upper oil pan and the crankcase has become displaced resulting in engine oil seepage.
02-164-162017-08-14. Service bulletin. ENGINE AND ENGINE COOLING. This Service Information bulletin announces a design change to the internal contact portion of the oil pressure switch to increase durability
02-162-152017-02-27. Service bulletin. ENGINE. "THIS SERVICE INFORMATION BULLETIN ANNOUNCES A DESIGN CHANGE TO THE OIL PRESSURE SWITCH ASSEMBLY. NICKEL PLATING HAS BEEN APPLIED TO THE INTERNAL SWITCH CONTACTS TO ENHANCE THEIR DURABILITY AND REDUCE THE POSSIBILITY OF POOR CONTACT WHICH COULD AFFECT OPERATION OR CAUSE IMPROPER ILLUMINATION OF THE OIL PRESSURE WARNING LAMP. A SMALL PILOT PORTION WAS ADDED TO THE THREADED AREA ON P.N. 25240KA051 AS SHOWN IN THE ILLUSTRATION BELOW."
07-95-152017-02-22. Service bulletin. ENGINE. "THIS SERVICE INFORMATION BULLETIN ANNOUNCES A DESIGN CHANGE TO THE ENGINE WIRING HARNESS TO PREVENT WATER INTRUSION AND ACCUMULATION FROM OCCURRING INSIDE THE CORRUGATED PLASTIC HARNESS TUBING. IN SOME CASES, THIS ACCUMULATION MAY CAUSE A CHECK ENGINE LIGHT TO ILLUMINATE AND EXHAUST CAMSHAFT POSITION-RELATED DTCS TO BE STORED IN THE ECM MEMORY (E.G. P0390, P0391). THE CHANGE INVOLVES FULL TAPING OF THE HARNESS TUBE AS OPPOSED TO PITCH TAPING (NO TAPE OVERLAP) TO ENHANCE “SEALING” OF THE HARNESS TUBE AND PREVENT WATER INTRUSION WHICH MAY OCCUR DURING ENGINE CLEANING (STEAM CLEANING AND / OR PRESSURE WASHING). UNDER NORMAL DRIVING CONDITIONS, THERE IS NO POSSIBILITY OF THIS CONDITION OCCURRING. COMPARISON PHOTOS OF THE TAPING ARE SHOWN BELOW FOR REFERENCE."
09-59-14R2017-02-16. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. THIS BULLETIN PROVIDES A TREATMENT PROCEDURE TO ADDRESS A CUSTOMER CONCERN OF RUST DEVELOPING ON THE FRONT EXHAUST PIPE HEAT SHIELD RETAINING BOLT HEADS AS SHOWN IN THE ILLUSTRATIONS BELOW.
11-161-162016-12-27. Service bulletin. ENGINE. "THIS BULLETIN ANNOUNCES THE AVAILABILITY OF NEW REPROGRAMMING FILES FOR OPTIMIZING THE ECM TO ADDRESS THE FOLLOWING CUSTOMER CONCERN: • ROUGH IDLE AFTER A WARM ENGINE RESTART. IN RARE CASES, DTC P0300 MAY ALSO BE STORED."
PM012016-11-21. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. PARTS ANNOUNCEMENT OF 2015 WRX & STI PERFORMANCE EXHAUST SYSTEMS
11-143-142016-11-15. Service bulletin. ENGINE; ELECTRICAL SYSTEM:SOFTWARE. REPROGRAMMING FILES FOR DTC P0606
WQW-58R2016-11-08. Service bulletin. ENGINE. SUBARU OF AMERICA, INC. HAS INITIATED A SERVICE PROGRAM TO REPROGRAM THE ENGINE CONTROL MODULE (ECM) ON CERTAIN 2015 MODEL YEAR WRX VEHICLES AND CERTAIN 2014 AND 2015 MODEL YEAR 2.0XT FORESTER VEHICLES EQUIPPED WITH A 2.0 LITER TURBOCHARGED ENGINE, TO ADDRESS A POSSIBLE PRE]IGNITION ISSUE.
4-3-142016-05-23. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. SUMMARY TO BE PROVIDED ON A FUTURE DATE.

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