# Service bulletin 02\-172\-18R

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.

- Type: Service bulletin
- NHTSA id: 10140424
- Published by NHTSA: 2018\-06\-11
- Manufacturer's number: 02\-172\-18R
- Manufacturer's date: 2018\-02\-06
- NHTSA component: ENGINE

## NHTSA's 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 which has an increased resistance to engine heat.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2018/MC-10140424-9999.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2018/MC-10140424-0001.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Engine

## Vehicles listed

- 2003 to 2013 SUBARU FORESTER
- 2002 to 2011 SUBARU IMPREZA
- 2003 to 2012 SUBARU LEGACY
- 2003 to 2004 SUBARU OUTBACK
- 2005 to 2012 SUBARU OUTBACK
- 2002 to 2006 SUBARU WRX
- 2008 to 2014 SUBARU WRX
- 2004 to 2005 SUBARU WRX STI
- 2008 to 2014 SUBARU WRX STI
- 2015 to 2017 SUBARU WRX STI

## Recalls for the same vehicles and component

- [16V162000](/recalls/nhtsa/16V162000.md), 2016-03-21: ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:TURBO/SUPERCHARGER
- [10V196000](/recalls/nhtsa/10V196000.md), 2010-05-07: ENGINE AND ENGINE COOLING:COOLING SYSTEM:HOSES/LINES/PIPING/FITTINGS
- [08V460000](/recalls/nhtsa/08V460000.md), 2008-09-11: ENGINE AND ENGINE COOLING:ENGINE
- [2008333](/recalls/tc/2008333.md), 2008-09-09: Engine
- [04V473000](/recalls/nhtsa/04V473000.md), 2004-10-01: ENGINE AND ENGINE COOLING
- [02V240000](/recalls/nhtsa/02V240000.md), 2002-09-13: ENGINE AND ENGINE COOLING:COOLING SYSTEM
- [2002162](/recalls/tc/2002162.md), 2002-09-11: Engine

## Other bulletins for the same vehicles and component

- [02\-193\-24R](/bulletins/11034269.md), 2026-07-02, Service bulletin: ENGINE. This bulletin provides updated parts information and a service procedure to follow for removing accumulated carbon deposits from fuel injectors and internal engine components \(e.g. intake valves and / or manifold, and combustion chambers\). \(This is an revised version of the original bulletin.\)
- [09\-74\-21R](/bulletins/11034264.md), 2026-07-02, Service bulletin: ENGINE; FUEL/PROPULSION SYSTEM. This bulletin provides updated parts information and a service procedure to follow for removing accumulated carbon deposits from fuel injectors and internal engine components \(e.g. intake valves and / or manifold, and combustion chambers\). \(This is an revised version of the original bulletin.\)
- [02\-193\-24R](/bulletins/11033065.md), 2026-06-01, Service bulletin: ENGINE. This bulletin provides updated parts information and a service procedure to follow for removing accumulated carbon deposits from fuel injectors and internal engine components \(e.g. intake valves and / or manifold, and combustion chambers\).
- [18\-230\-26](/bulletins/11033051.md), 2026-06-01, Service bulletin: ENGINE. This bulletin announces the diagnostic procedures to be used when DTCs B1571\(REFERENCE CODE INCOMPATIBILITY IMMOBILIZER CM TO ECM\) and B1572\(IMM CIRCUIT EXCEPT ANTENNA CIRCUIT\) are detected by Keyless Access with Push Button Start\(KACM\).
- [15\-300\-22R](/bulletins/11027982.md), 2026-02-02, Service bulletin: ELECTRICAL SYSTEM; ENGINE. This Bulletin provides the diagnostic procedure for the STARLINK® Remote Engine Start \(RES\).
- [09\-74\-21R](/bulletins/11027090.md), 2026-01-06, Service bulletin: ENGINE; FUEL/PROPULSION SYSTEM. This bulletin provides updated parts information and a service procedure to follow for removing accumulated carbon deposits from fuel injectors and internal engine components \(e.g. intake valves and / or manifold, and combustion chambers\).
- [18\-226\-25R](/bulletins/11027083.md), 2026-01-06, Service bulletin: ELECTRICAL SYSTEM; ENGINE. This Service Information Bulletin provides the Service Manual Correction to the diagnostic procedure for DTC B2A16 \(Immobilizer Key Collation Diagnosis\).
- [18\-228\-25R](/bulletins/11027081.md), 2026-01-06, Service bulletin: ENGINE; FUEL/PROPULSION SYSTEM; ELECTRICAL SYSTEM. This bulletin announces the diagnostic procedures to be used when DTCs P2096 \(POST CATALYST FUEL TRIM SYSTEM TOO LEAN BANK 1\) and P2097 \(POST CATALYST FUEL TRIM SYSTEM TOO RICH BANK 1\) are detected by the Engine Control Module \(ECM\).
- [18\-228\-25](/bulletins/11025790.md), 2025-12-01, Service bulletin: ENGINE; ELECTRICAL SYSTEM. This bulletin announces the diagnostic procedures to be used when DTCs P2096 \(POST CATALYST FUEL TRIM SYSTEM TOO LEAN BANK 1\) and P2097 \(POST CATALYST FUEL TRIM SYSTEM TOO RICH BANK 1\) are detected by the Engine Control Module \(ECM\).
- [07\-235\-25](/bulletins/11023536.md), 2025-10-02, Service bulletin: FORWARD COLLISION AVOIDANCE: WARNINGS; ENGINE. In the interest of customer satisfaction Subaru of America, Inc. \(SOA\) is extending the New Car Limited Warranty coverage in the models listed. The extension will address instances of “phantom braking” or the EyeSight/RAB systems causing unnecessary stoppage/slowing of the vehicle.

JSON: [/v1/bulletins/10140424](/v1/bulletins/10140424)

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