Subaru OEM Cylinder Block Plug Coolant Subaru WRX / STI / Outback / Legacy / Impreza / Forester | 11021AA121

Product Fitment:

2003-2006 Subaru Baja
1998-2013 Subaru Forester
1993, 1995-2010 Subaru Impreza
1990-2007, 2009-2012 Subaru Legacy
1996-2012 Subaru Outback
2004-2007 Subaru STI
1995-1997 Subaru SVX
2002-2005, 2008-2010, 2012-2014 Subaru WRX

Overview

The Genuine Subaru OEM Cylinder Block Plug – Coolant (Part #11021AA121) is a factory-replacement sealing plug designed to maintain the integrity of your engine's cooling system. This precision-engineered component ensures a leak-free seal at the cylinder block coolant passage, delivering the exact fit and performance your Subaru was built with. Ideal for owners performing engine rebuilds, coolant system repairs, or preventive maintenance who demand OEM quality and reliability.

Key Features & Benefits

• Genuine Subaru OEM Part – Manufactured to Subaru's exact factory specifications, ensuring a perfect fit and eliminating the guesswork of aftermarket alternatives.
• Exact-Fit Guarantee – Engineered specifically for Subaru cylinder blocks; no modification or adaptation required for installation.
• Leak-Free Sealing – Designed to withstand the pressure and thermal cycling of Subaru's cooling system, preventing coolant loss and potential overheating.
• Durable Construction – Built to OEM material standards for long-term reliability under engine operating conditions.
• Factory Warranty Eligible – As a genuine Subaru part, it is backed by Subaru's OEM parts warranty when installed by an authorized dealer or qualified technician.
• Direct Replacement – Replaces a worn, damaged, or leaking cylinder block coolant plug with confidence that the replacement matches the original component exactly.

What's Included

• 1x Genuine Subaru Cylinder Block Plug – Coolant (Part #11021AA121)

Specifications

Installation

Installation of this cylinder block coolant plug is typically performed during engine disassembly, rebuild, or coolant system repair. The plug seats directly into the cylinder block coolant passage and must be installed with proper torque to ensure a leak-free seal. Draining the coolant system before replacement is required. Professional installation by a qualified Subaru technician or experienced mechanic is recommended to ensure correct fitment and torque specification compliance.