TSB: SUBARU FORESTER, IMPREZA, LEGACY, OUTBACK, WRX, WRX STI (2002–2017)

Bulletin 02-172-18R — February 6, 2018

Bulletin Details

Bulletin ID02-172-18R
ManufacturerSUBARU
ModelsFORESTER, IMPREZA, LEGACY, OUTBACK, WRX, WRX STI
Model Years2002–2017
Date IssuedFebruary 6, 2018
Date Added to NHTSAJune 11, 2018
ComponentENGINE (PWS)
Vehicles Affected195 combinations

What is a TSB?

A Technical Service Bulletin is a document issued by the vehicle manufacturer to inform dealership technicians about a known issue and the recommended repair procedure. TSBs are not mandatory recalls — they serve as repair guidance for common problems.

If your vehicle has this issue, bring this bulletin ID to your dealer. If under warranty, the repair should be covered at no cost.

Summary

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 whi

Affected Vehicles

MakeModelYearComponent
SUBARU WRX STI 2017 060000 ENGINE (PWS)
SUBARU WRX STI 2017 350000 EQUIPMENT
SUBARU WRX STI 2017 060000 ENGINE (PWS)
SUBARU WRX STI 2016 060000 ENGINE (PWS)
SUBARU WRX STI 2016 350000 EQUIPMENT
SUBARU WRX STI 2016 060000 ENGINE (PWS)
SUBARU WRX STI 2015 060000 ENGINE (PWS)
SUBARU WRX STI 2015 350000 EQUIPMENT
SUBARU WRX STI 2015 060000 ENGINE (PWS)
SUBARU WRX 2014 060000 ENGINE (PWS)
SUBARU WRX 2014 350000 EQUIPMENT
SUBARU WRX 2014 060000 ENGINE (PWS)
SUBARU WRX STI 2014 060000 ENGINE (PWS)
SUBARU WRX STI 2014 350000 EQUIPMENT
SUBARU WRX STI 2014 060000 ENGINE (PWS)
SUBARU FORESTER 2013 060000 ENGINE (PWS)
SUBARU FORESTER 2013 350000 EQUIPMENT
SUBARU FORESTER 2013 060000 ENGINE (PWS)
SUBARU WRX 2013 060000 ENGINE (PWS)
SUBARU WRX 2013 350000 EQUIPMENT
SUBARU WRX 2013 060000 ENGINE (PWS)
SUBARU WRX STI 2013 060000 ENGINE (PWS)
SUBARU WRX STI 2013 350000 EQUIPMENT
SUBARU WRX STI 2013 060000 ENGINE (PWS)
SUBARU FORESTER 2012 060000 ENGINE (PWS)
SUBARU FORESTER 2012 350000 EQUIPMENT
SUBARU FORESTER 2012 060000 ENGINE (PWS)
SUBARU LEGACY 2012 060000 ENGINE (PWS)
SUBARU LEGACY 2012 350000 EQUIPMENT
SUBARU LEGACY 2012 060000 ENGINE (PWS)
SUBARU OUTBACK 2012 060000 ENGINE (PWS)
SUBARU OUTBACK 2012 350000 EQUIPMENT
SUBARU OUTBACK 2012 060000 ENGINE (PWS)
SUBARU WRX 2012 060000 ENGINE (PWS)
SUBARU WRX 2012 350000 EQUIPMENT
SUBARU WRX 2012 060000 ENGINE (PWS)
SUBARU WRX STI 2012 060000 ENGINE (PWS)
SUBARU WRX STI 2012 350000 EQUIPMENT
SUBARU WRX STI 2012 060000 ENGINE (PWS)
SUBARU FORESTER 2011 060000 ENGINE (PWS)
SUBARU FORESTER 2011 350000 EQUIPMENT
SUBARU FORESTER 2011 060000 ENGINE (PWS)
SUBARU IMPREZA 2011 060000 ENGINE (PWS)
SUBARU IMPREZA 2011 350000 EQUIPMENT
SUBARU IMPREZA 2011 060000 ENGINE (PWS)
SUBARU LEGACY 2011 060000 ENGINE (PWS)
SUBARU LEGACY 2011 350000 EQUIPMENT
SUBARU LEGACY 2011 060000 ENGINE (PWS)
SUBARU OUTBACK 2011 060000 ENGINE (PWS)
SUBARU OUTBACK 2011 350000 EQUIPMENT
SUBARU OUTBACK 2011 060000 ENGINE (PWS)
SUBARU WRX 2011 060000 ENGINE (PWS)
SUBARU WRX 2011 350000 EQUIPMENT
SUBARU WRX 2011 060000 ENGINE (PWS)
SUBARU WRX STI 2011 060000 ENGINE (PWS)
SUBARU WRX STI 2011 350000 EQUIPMENT
SUBARU WRX STI 2011 060000 ENGINE (PWS)
SUBARU FORESTER 2010 060000 ENGINE (PWS)
SUBARU FORESTER 2010 350000 EQUIPMENT
SUBARU FORESTER 2010 060000 ENGINE (PWS)
SUBARU IMPREZA 2010 060000 ENGINE (PWS)
SUBARU IMPREZA 2010 350000 EQUIPMENT
SUBARU IMPREZA 2010 060000 ENGINE (PWS)
SUBARU LEGACY 2010 060000 ENGINE (PWS)
SUBARU LEGACY 2010 350000 EQUIPMENT
SUBARU LEGACY 2010 060000 ENGINE (PWS)
SUBARU OUTBACK 2010 060000 ENGINE (PWS)
SUBARU OUTBACK 2010 350000 EQUIPMENT
SUBARU OUTBACK 2010 060000 ENGINE (PWS)
SUBARU WRX 2010 060000 ENGINE (PWS)
SUBARU WRX 2010 350000 EQUIPMENT
SUBARU WRX 2010 060000 ENGINE (PWS)
SUBARU WRX STI 2010 060000 ENGINE (PWS)
SUBARU WRX STI 2010 350000 EQUIPMENT
SUBARU WRX STI 2010 060000 ENGINE (PWS)
SUBARU FORESTER 2009 060000 ENGINE (PWS)
SUBARU FORESTER 2009 350000 EQUIPMENT
SUBARU FORESTER 2009 060000 ENGINE (PWS)
SUBARU IMPREZA 2009 060000 ENGINE (PWS)
SUBARU IMPREZA 2009 350000 EQUIPMENT
SUBARU IMPREZA 2009 060000 ENGINE (PWS)
SUBARU LEGACY 2009 060000 ENGINE (PWS)
SUBARU LEGACY 2009 350000 EQUIPMENT
SUBARU LEGACY 2009 060000 ENGINE (PWS)
SUBARU OUTBACK 2009 060000 ENGINE (PWS)
SUBARU OUTBACK 2009 350000 EQUIPMENT
SUBARU OUTBACK 2009 060000 ENGINE (PWS)
SUBARU WRX 2009 060000 ENGINE (PWS)
SUBARU WRX 2009 350000 EQUIPMENT
SUBARU WRX 2009 060000 ENGINE (PWS)
SUBARU WRX STI 2009 060000 ENGINE (PWS)
SUBARU WRX STI 2009 350000 EQUIPMENT
SUBARU WRX STI 2009 060000 ENGINE (PWS)
SUBARU FORESTER 2008 060000 ENGINE (PWS)
SUBARU FORESTER 2008 350000 EQUIPMENT
SUBARU FORESTER 2008 060000 ENGINE (PWS)
SUBARU IMPREZA 2008 060000 ENGINE (PWS)
SUBARU IMPREZA 2008 350000 EQUIPMENT
SUBARU IMPREZA 2008 060000 ENGINE (PWS)
SUBARU LEGACY 2008 060000 ENGINE (PWS)
SUBARU LEGACY 2008 350000 EQUIPMENT
SUBARU LEGACY 2008 060000 ENGINE (PWS)
SUBARU OUTBACK 2008 060000 ENGINE (PWS)
SUBARU OUTBACK 2008 350000 EQUIPMENT
SUBARU OUTBACK 2008 060000 ENGINE (PWS)
SUBARU WRX 2008 060000 ENGINE (PWS)
SUBARU WRX 2008 350000 EQUIPMENT
SUBARU WRX 2008 060000 ENGINE (PWS)
SUBARU WRX STI 2008 060000 ENGINE (PWS)
SUBARU WRX STI 2008 350000 EQUIPMENT
SUBARU WRX STI 2008 060000 ENGINE (PWS)
SUBARU FORESTER 2007 060000 ENGINE (PWS)
SUBARU FORESTER 2007 350000 EQUIPMENT
SUBARU FORESTER 2007 060000 ENGINE (PWS)
SUBARU IMPREZA 2007 060000 ENGINE (PWS)
SUBARU IMPREZA 2007 350000 EQUIPMENT
SUBARU IMPREZA 2007 060000 ENGINE (PWS)
SUBARU LEGACY 2007 060000 ENGINE (PWS)
SUBARU LEGACY 2007 350000 EQUIPMENT
SUBARU LEGACY 2007 060000 ENGINE (PWS)
SUBARU OUTBACK 2007 060000 ENGINE (PWS)
SUBARU OUTBACK 2007 350000 EQUIPMENT
SUBARU OUTBACK 2007 060000 ENGINE (PWS)
SUBARU FORESTER 2006 060000 ENGINE (PWS)
SUBARU FORESTER 2006 350000 EQUIPMENT
SUBARU FORESTER 2006 060000 ENGINE (PWS)
SUBARU IMPREZA 2006 060000 ENGINE (PWS)
SUBARU IMPREZA 2006 350000 EQUIPMENT
SUBARU IMPREZA 2006 060000 ENGINE (PWS)
SUBARU LEGACY 2006 060000 ENGINE (PWS)
SUBARU LEGACY 2006 350000 EQUIPMENT
SUBARU LEGACY 2006 060000 ENGINE (PWS)
SUBARU OUTBACK 2006 060000 ENGINE (PWS)
SUBARU OUTBACK 2006 350000 EQUIPMENT
SUBARU OUTBACK 2006 060000 ENGINE (PWS)
SUBARU WRX 2006 060000 ENGINE (PWS)
SUBARU WRX 2006 350000 EQUIPMENT
SUBARU WRX 2006 060000 ENGINE (PWS)
SUBARU FORESTER 2005 060000 ENGINE (PWS)
SUBARU FORESTER 2005 350000 EQUIPMENT
SUBARU FORESTER 2005 060000 ENGINE (PWS)
SUBARU IMPREZA 2005 060000 ENGINE (PWS)
SUBARU IMPREZA 2005 350000 EQUIPMENT
SUBARU IMPREZA 2005 060000 ENGINE (PWS)
SUBARU LEGACY 2005 060000 ENGINE (PWS)
SUBARU LEGACY 2005 350000 EQUIPMENT
SUBARU LEGACY 2005 060000 ENGINE (PWS)
SUBARU OUTBACK 2005 060000 ENGINE (PWS)
SUBARU OUTBACK 2005 350000 EQUIPMENT
SUBARU OUTBACK 2005 060000 ENGINE (PWS)
SUBARU WRX 2005 060000 ENGINE (PWS)
SUBARU WRX 2005 350000 EQUIPMENT
SUBARU WRX 2005 060000 ENGINE (PWS)
SUBARU WRX STI 2005 060000 ENGINE (PWS)
SUBARU WRX STI 2005 350000 EQUIPMENT
SUBARU WRX STI 2005 060000 ENGINE (PWS)
SUBARU FORESTER 2004 060000 ENGINE (PWS)
SUBARU FORESTER 2004 350000 EQUIPMENT
SUBARU FORESTER 2004 060000 ENGINE (PWS)
SUBARU IMPREZA 2004 060000 ENGINE (PWS)
SUBARU IMPREZA 2004 350000 EQUIPMENT
SUBARU IMPREZA 2004 060000 ENGINE (PWS)
SUBARU LEGACY 2004 060000 ENGINE (PWS)
SUBARU LEGACY 2004 350000 EQUIPMENT
SUBARU LEGACY 2004 060000 ENGINE (PWS)
SUBARU OUTBACK 2004 060000 ENGINE (PWS)
SUBARU OUTBACK 2004 350000 EQUIPMENT
SUBARU OUTBACK 2004 060000 ENGINE (PWS)
SUBARU WRX 2004 060000 ENGINE (PWS)
SUBARU WRX 2004 350000 EQUIPMENT
SUBARU WRX 2004 060000 ENGINE (PWS)
SUBARU WRX STI 2004 060000 ENGINE (PWS)
SUBARU WRX STI 2004 350000 EQUIPMENT
SUBARU WRX STI 2004 060000 ENGINE (PWS)
SUBARU FORESTER 2003 060000 ENGINE (PWS)
SUBARU FORESTER 2003 350000 EQUIPMENT
SUBARU FORESTER 2003 060000 ENGINE (PWS)
SUBARU IMPREZA 2003 060000 ENGINE (PWS)
SUBARU IMPREZA 2003 350000 EQUIPMENT
SUBARU IMPREZA 2003 060000 ENGINE (PWS)
SUBARU LEGACY 2003 060000 ENGINE (PWS)
SUBARU LEGACY 2003 350000 EQUIPMENT
SUBARU LEGACY 2003 060000 ENGINE (PWS)
SUBARU OUTBACK 2003 060000 ENGINE (PWS)
SUBARU OUTBACK 2003 350000 EQUIPMENT
SUBARU OUTBACK 2003 060000 ENGINE (PWS)
SUBARU WRX 2003 060000 ENGINE (PWS)
SUBARU WRX 2003 350000 EQUIPMENT
SUBARU WRX 2003 060000 ENGINE (PWS)
SUBARU IMPREZA 2002 060000 ENGINE (PWS)
SUBARU IMPREZA 2002 350000 EQUIPMENT
SUBARU IMPREZA 2002 060000 ENGINE (PWS)
SUBARU WRX 2002 060000 ENGINE (PWS)
SUBARU WRX 2002 350000 EQUIPMENT
SUBARU WRX 2002 060000 ENGINE (PWS)

Related SUBARU Recalls

CampaignModelYearComponentSummary
FORESTER HYBRID 2025 FUEL SYSTEM, GASOLINE:STORAGE:TANK AS... Subaru of America, Inc. is recalling certain 2026 Crosstrek hybrid, and 2025 ...
CROSSTREK HYBRID 2026 FUEL SYSTEM, GASOLINE:STORAGE:TANK AS... Subaru of America, Inc. is recalling certain 2026 Crosstrek hybrid, and 2025 ...
FORESTER 2026 STRUCTURE:BODY:HATCHBACK/LIFTGATE:HIN... Subaru of America, Inc. (Subaru) is recalling certain 2026 Forester vehicles....
SOLTERRA 2025 BACK OVER PREVENTION:DISPLAY FUNCTION Toyota Motor Engineering & Manufacturing (Toyota) is recalling certain 2022-2...
SOLTERRA 2023 BACK OVER PREVENTION:DISPLAY FUNCTION Toyota Motor Engineering & Manufacturing (Toyota) is recalling certain 2022-2...

What Should You Do?

If your vehicle is affected by this TSB, contact your authorized SUBARU dealer. Bring this bulletin ID (02-172-18R) when you visit. If under warranty, the repair should be free. If your warranty has expired, ask about goodwill coverage — manufacturers sometimes cover TSB-related repairs beyond the warranty period.

Frequently Asked Questions

A recall is a mandatory safety fix — the manufacturer must repair every affected vehicle for free. A TSB is an advisory document that describes a known issue and the recommended fix, but repairs are not required. However, some TSBs eventually lead to recalls if the issue poses a safety risk. TSBs are generally issued for quality or performance problems, while recalls address safety defects.

If your vehicle is still under the manufacturer's warranty, TSB-related repairs are typically covered at no cost. If your warranty has expired, you can ask the dealer about goodwill or customer assistance programs. Many manufacturers will cover or partially cover repairs for well-known issues, especially if the TSB was issued recently or affects a large number of vehicles.

Check the make, model, and model year listed above against your vehicle. If they match, this bulletin likely applies. However, TSBs may only affect vehicles with specific production dates, VIN ranges, or configurations. Your dealer can confirm by entering your VIN into their service system, which will show all applicable TSBs and recalls.

This data comes from the National Highway Traffic Safety Administration (NHTSA). Manufacturers are required to submit copies of all communications (including TSBs) sent to their dealers to NHTSA. The agency makes this data publicly available as part of its vehicle safety monitoring program.