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Service bulletin WVT-30

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 id10034046
Published by NHTSA2010-10-13
Manufacturer's numberWVT-30
Manufacturer's date2010-08-01
NHTSA componentELECTRICAL SYSTEM:SOFTWARE

NHTSA's summary

SUBARU SERVICE CAMPAIGN: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. ENGINE CONTROL MODULE (ECM) REPROGRAMMING. A MODIFICATION TO THE ENGINE CONTROL MODULE (ECM) 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. CSC LETTER WAS REC'D. *PE

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, Software

Vehicles listed
SUBARU IMPREZA2011
SUBARU LEGACY2011
SUBARU OUTBACK2011

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
0784142023-04-03. Service bulletin. Revised B1650 Diagnostics and ODS Rezeroing Procedure
15-162-132016-12-30. Service bulletin. THIS BULLETIN PROVIDES A SERVICE PROCEDURE FOR REPLACING THE BLUETOOTH HANDS-FREE MICROPHONE WHICH IS NOW AVAILABLE AS AN INDIVIDUAL SERVICE PART (SEPARATE FROM THE MAP LIGHT ASSEMBLY). THE REPLACEMENT MICROPHONE IS DESIGNED TO REDUCE BACKGROUND NOISE WHEN USING THE HANDS-FREE TELEPHONE FEATURE.
15-162-13R2016-11-18. Service bulletin. THIS BULLETIN PROVIDES A SERVICE PROCEDURE FOR REPLACING THE BLUETOOTH HANDS-FREE MICROPHONE WHICH IS NOW AVAILABLE AS AN INDIVIDUAL SERVICE PART (SEPARATE FROM THE MAP LIGHT ASSEMBLY). THE REPLACEMENT MICROPHONE IS DESIGNED TO REDUCE BACKGROUND NOISE WHEN USING THE HANDS-FREE TELEPHONE FEATURE.
16-93-152016-09-22. Service bulletin. THIS BULLETIN ANNOUNCES THE AVAILABILITY OF REPROGRAMMING FILES FOR OPTIMIZING THE TCM LOGIC USED IN THE LISTED CVT-EQUIPPED VEHICLES. THIS NEW LOGIC PROVIDES ENHANCED CONTROL OF THE CVT PRIMARY PULLEY OIL PRESSURE CIRCUIT FOR AN INCREASED LEVEL OF PERFORMANCE DURING STOP-AND-GO DRIVING. THIS REPROGRAMMING MUST BE INSTALLED ANYTIME A CVT ASSEMBLY IS REPLACED WITH A NEW OR REMANUFACTURED CVT ASSEMBLY.
SB-11-135-132014-01-03. Service bulletin. SUBARU: ECM IS AVAILABLE FOR REPROGRAMMING FILES TO ADDRESS FALSE CEL/MIL ILLUMINATION AND THE DIAGNOSTIC TROUBLE CODE (DTC) P050A RESULTED FROM SPECIFIC CLUTCH OPERATIONS AND/OR DRIVING PATTERNS AFTER STARTING ENGINE. MODEL 2011-2013 LEGACY, FORESTER, IMPREZA. *PE
WQC-392012-12-04. Service bulletin. SUBARU: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. SOFTWARE CHANGE WILL NOT AFFECT FUEL ECONOMY OR PERFORMANCE, EVEN THOUGH A CORRECTION, FOR ENGINE CONTROL MODULE, HAS BEEN DEVELOPED FOR THE DEFICIENCY IN OBDII SYSTEM THERMOSTAT MONITORING LOGIC. MODELS 2011-2012 LEGACY, OUTBACK, IMPREZA SEDAN, WAGON, FORESTER, TRIBECA AND 2013 BRZ. *PE UPDATED 1/31/13. *PE