Subaru OEM Engine Crankshaft Sealing Flange Gasket Subaru WRX 2002-2005 | 11832AA031

Overview

The Genuine Subaru OEM Engine Crankshaft Sealing Flange Gasket (Part #11832AA031) is a factory-replacement sealing gasket designed specifically for the 2002–2005 Subaru WRX equipped with the EJ205 turbocharged engine. This OEM part ensures an airtight seal in the engine breather system, preventing oil vapor leaks and maintaining proper crankcase ventilation — critical for engine health and emissions compliance. Engineered to exact Subaru factory specifications, this gasket delivers a perfect fit and long-lasting reliability that aftermarket alternatives simply cannot match.

Key Features & Benefits

• Genuine Subaru OEM Quality — Manufactured to the same specifications as the original factory part, ensuring exact fitment and performance on your EJ205-equipped Subaru.
• Perfect Seal — Precision-engineered gasket material prevents oil vapor and blow-by leaks in the crankcase breather system, protecting your engine and keeping it running clean.
• Direct Replacement — Bolt-on replacement requires no modification; restores OEM function immediately upon installation.
• Durable Construction — Built to withstand the heat, pressure, and chemical exposure of a turbocharged engine environment for long service life.
• Factory Warranty Coverage — As a Genuine Subaru OEM part, it is backed by Subaru's standard parts warranty for peace of mind.
• Emissions & Crankcase Integrity — Maintains proper positive crankcase ventilation (PCV) operation, supporting emissions compliance and preventing oil contamination.

What's Included

• 1x Genuine Subaru OEM Engine Crankshaft Sealing Flange Gasket (Part #11832AA031)

Specifications

Fitment & Compatibility

Product Fitment:

• 2002-2005 Subaru WRX

Please verify your exact year, model, and engine code before ordering to confirm compatibility.

Installation

This is a direct OEM replacement gasket. Installation is straightforward for anyone performing a top-end engine service — simply remove the old gasket, clean the mating surface thoroughly, and install the new gasket in the same orientation. No special tools are required, though a torque wrench is recommended to ensure proper sealing and prevent over-tightening. Always inspect related seals and hoses in the crankcase breather system while they're accessible, as they may show similar wear under high-mileage conditions.