WenmarOpen by Wenmar Pro

Service bulletins for the 2008 Subaru Forester

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.

158 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
WQD-40DA2016-09-14. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR; ELECTRICAL SYSTEM:SOFTWARE. SUBARU OF AMERICA, INC. HAS DETERMINED THAT VEHICLES AFFECTED BY THIS SERVICE PROGRAM REQUIRE FRONT CATALYTIC CONVERTER REPLACEMENT AND ECM REPROGRAMMING. FOR VEHICLES AFFECTED BY THIS SERVICE PROGRAM, EFFICIENCY OF THE FRONT CATALYTIC CONVERTER MAY DEGRADE OVER TIME. IF THE CATALYTIC CONVERTER EFFICIENCY DEGRADES BEYOND AN ACCEPTABLE LEVEL, THE VEHICLE MAY BE RELEASING AIR POLLUTANTS THAT EXCEED CALIFORNIA STANDARDS. TO CORRECT THIS CONDITION, IT WILL BE NECESSARY TO REPLACE THE FRONT CATALYTIC CONVERTER AND REPROGRAM THE ENGINE CONTROL MODULE SOFTWARE LOGIC WHICH IMPROVES MANAGEMENT OF THE CATALYTIC CONVERTER. THIS SOFTWARE CHANGE WILL NOT ADVERSELY AFFECT FUEL ECONOMY OR PERFORMANCE OF THE VEHICLE. REPLACEMENT PARTS AND ECM REPROGRAMMING PAK FILES WILL NOT BE AVAILABLE FOR ALL MODELS AT THE TIME THIS SERVICE PROGRAM IS INITIALLY RELEASED. PAK FILES WILL BE AVAILABLE IN ACCORDANCE WITH THE SCHEDULE FOUND ON PAGE 4 OF THE WQD-40 BULLETIN. ADDITIONALLY, BECAUSE THIS PROGRAM AFFECTS A HIGH VOLUME OF VEHICLES WITHIN THE AFFECTED STATES, MAILING OF OWNER NOTIFICATION LETTERS WILL BE PHASED ACCORDING TO THE FOLLOWING SCHEDULE. THIS SCHEDULE COINCIDES WITH REPLACEMENT PART AND PAK FILE AVAILABILITY.
WQD-402016-05-13. Service bulletin. ENGINE. SUMMARY TO BE PROVIDED ON A FUTURE DATE.
WQD-402016-05-13. Service bulletin. ENGINE. SUMMARY TO BE PROVIDED ON A FUTURE DATE.
WQD-402013-03-26. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR. SUBARU: OVER TIME, FRONT CATALYTIC CONVERTER EFFICIENCY DEGRADES BEYOND AN ACCEPTABLE LEVEL AND RELEASES AIR POLLUTANTS THAT REQUIRES THE FRONT CATALYTIC CONVERTER TO BE REPLACED AND ECM TO BE REPROGRAMMED. MODELS 2008-2009 LEGACY, OUTBACK, FORESTER. *PE
SPB-WVU-312011-06-29. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. SUBARU SERVICE CAMPAIGN: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. ECM REPROGRAMMING PROCEDURE. 2006-2010 LEGACY/OUTBACK/FORESTER/IMPREZA. *RM UPDATED 9/26/11. *PE
WVM-232011-06-28. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE; ELECTRICAL SYSTEM:SOFTWARE. SUBARU SERVICE CAMPAIGN: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. A SOFTWARE PROBLEM IS CAUSING THE CATALYTIC CONVERTER TO DEGRADE WHEN DRIVING AT HIGH SPEEDS. THIS WILL CAUSE THE ENGINE LIGHT TO COME ON. *RM
SB-WVM-232010-04-07. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE; ELECTRICAL SYSTEM:SOFTWARE; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR. SUBARU SERVICE CAMPAIGN: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. ENGINE CONTROL MODULE (ECM) REPROGRAMMING. UNDER CERTAIN SEVERE DRIVING PATTERNS, SUCH AS HIGH SPEED HIGHWAY/UPHILL DRIVING AND/OR ACCELERATING WITH HIGH ENGINE REVOLUTIONS, THE EFFICIENCY OF AN AFFECTED VEHICLE'S CATALYTIC CONVERTER MAY BEGIN TO DEGRADE BEYOND DESIGN PARAMETERS. CSC LETTER WAS RECEIVED. *PE
SB-WVN-242010-04-07. Service bulletin. FUEL SYSTEM, GASOLINE:STORAGE:TANK ASSEMBLY; ENGINE AND ENGINE COOLING:ENGINE. SUBARU SERVICE CAMPAIGN: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. ENGINE CONTROL MODULE (ECM) REPROGRAMMING AND FUEL TANK ONE WAY FUEL VALVE REMOVAL. AFFECTED VEHICLES HAVE TWO CONDITIONS THAT MAY ADVERSELY AFFECT THE PERFORMANCE OF THE CATALYTIC CONVERTER. TO CORRECT THESE CONDITIONS, AFFECTED VEHICLES REQUIRE ECM REPROGRAMMING AND PERMANENT REMOVAL OF THE FUEL TANK ONE WAY FUEL VALVE. CSC LETTER WAS RECEIVED. *PE UPDATED 6/30/11. *PE

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