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Service bulletin 18-175-14

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10093707
Published by NHTSA2017-03-03
Manufacturer's number18-175-14
Manufacturer's date2014-11-19
NHTSA componentEQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; ELECTRICAL SYSTEM:SOFTWARE

NHTSA's summary

SERVICE MANUAL CORRECTIONS - THE PURPOSE OF THIS BULLETIN IS TO PROVIDE A DESCRIPTION OF CURRENT CHANGES TO SERVICE MANUALS AVAILABLE VIA THE SUBARU TECHNICAL INFORMATION SYSTEM (STIS) WEB SITE.

The document

No address for NHTSA's copy can be built for this communication. Ask the dealer for it by the manufacturer's number.

Components

Electrical system, Equipment and accessories, Labels and manuals, Software

Vehicles listed
SUBARU IMPREZA2007
SUBARU IMPREZA2012, 2013, 2014
SUBARU WRX2012 to 2014
SUBARU WRX STI2012 to 2014
SUBARU WRX STI2015 (the catalog's model; the bulletin names a series or trim of it)

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Other bulletins for the same vehicles and component
Announcements2023-04-24. Service bulletin. REMINDER: 925 New Technology Technical Training
0783142023-04-03. Service bulletin. Diagnostics for DTC B1500 and U1500
11-191-192019-08-06. Service bulletin. This bulletin announces availability of a new Engine Control Module (ECM) for the models listed above designed to address DTC P2610: “ECM/PCM ENGINE OFF TIMER PERFORMANCE”. Under certain RARE conditions, an electrostatic surge may influence the ECM’s internal timer used after the engine is turned off and store a DTC P2610 in memory. Hardware in the ECM has been changed to eliminate any impact from electrostatic surges.
TSG-12018-06-18. Service bulletin. Tech Support SD Card for Navi Complete
11-149-14R2018-06-18. Service bulletin. This bulletin announces the availability of reprogramming files and a revised oil level switch to optimize the ECM logic for engine oil level detection in the event of false or premature low engine oil level warning lamp illumination. Revised to add models.
15-197-162018-06-11. Service bulletin. Although Fujitsu TEN (F10) Navigation units utilize an externally (faceplate) accessible MicroSD memory card, the MicroSD card used in Clarion display audio units is internal and not accessible. In the event a ?Check SD Memory Card? alert message appears on the faceplate display, an exchange display audio unit must be ordered through the applicable Clarion audio exchange procedure.
02-132-12R2018-06-11. Service bulletin. This Bulletin provides a procedure for diagnosis and determination of necessary part replacement in the event any of the ?AVCS Slow Response? or ?AVCS System Failure? DTCs listed above are found to be stored in the ECM memory. A possible cause of these conditions is contamination within the camshaft sprocket and / or oil control solenoid valve (OCV) mechanism.
WVU31R2018-04-02. Service bulletin. 2.5 Liter N/A engine only. REVISED. Subaru of America, Inc. has determined that vehicles affected by this Service Program require ECM reprogramming. A modification to the Engine Control Module software logic has been developed to improve the performance of the emission control system. This software change will not adversely affect fuel economy or performance. This software update is intended to improve vehicle emissions when the vehicle is operated in cold weather and the engine is turned off and restarted within short periods of time such as in several minute intervals. The A/F sensor contains a heating element, which is controlled by the ECM, and which assists the sensor in reaching an optimum temperature, resulting in better accuracy. When the vehicle is operated under the conditions described above, there could be a longer than desired delay in the ECM?s turning on the A/F sensor heating element, resulting in higher than desired emissions. This software enhancement will correct that condition.
11171172018-04-02. Service bulletin. This bulletin announces the availability of reprogramming files to optimize the ECM and address isolated customer concerns of a spark knock (engine ping) -type sound.
11-174-17R2018-04-02. Service bulletin. This bulletin announces the availability of reprogramming files to optimize the ECM and address the following customer concerns: ? Check Engine light coming on (with DTC P05A0 stored in memory). ? Potential battery discharge (dead battery) after repeated periods of short-trip driving. ? A high (or ?hanging?) engine RPM after depressing the clutch pedal (Forester only).