Subaru OEM Fuel Pump and Hanger (05-06 STI) | 42021FE100

Overview

The Genuine Subaru OEM Fuel Pump and Hanger (Part #42021FE100) is the factory-original fuel delivery component designed specifically for the 2005–2006 Subaru Impreza WRX STI. Engineered to Subaru's exact specifications, this direct-fit replacement ensures optimal fuel flow, pressure consistency, and long-term reliability for your high-performance STI. Choosing a genuine OEM part guarantees a perfect fit and maintains your vehicle's factory warranty integrity.

Key Features & Benefits

• Genuine OEM Quality – Manufactured to Subaru's original factory specifications, ensuring exact fuel pressure and flow rates required by the EJ257 turbocharged engine.
• Exact-Fit Design – Engineered as a direct replacement with no cutting, splicing, or modification required — drops in exactly like the original unit.
• Complete Hanger Assembly – Includes the fuel pump integrated with the hanger/sending unit assembly, simplifying the replacement process and ensuring all components are matched.
• Factory Warranty Coverage – As a genuine Subaru part, it is eligible for Subaru's standard OEM parts warranty, giving you peace of mind.
• Consistent Fuel Delivery – Maintains precise fuel pressure critical for the STI's high-boost, high-performance application, helping protect your engine and fueling system.
• Corrosion-Resistant Construction – Built to withstand the demands of long-term fuel immersion with materials that meet Subaru's durability standards.

What's Included

• 1x Genuine Subaru OEM Fuel Pump and Hanger Assembly (Part #42021FE100)

Specifications

Fitment & Compatibility

This genuine Subaru fuel pump and hanger assembly is designed to fit the following vehicles:

Cross-Reference / OEM Part Number: 42021FE100. Always verify your vehicle's VIN and current part number before ordering to confirm fitment.

Installation

This fuel pump and hanger assembly is designed as a direct OEM replacement. Installation involves accessing the fuel tank by removing the rear seat cushion and fuel pump access panel. The assembly mounts to the top of the fuel tank using the factory locking ring. While a mechanically experienced DIY installer can complete this repair, professional installation by a certified Subaru technician is recommended to ensure proper fuel system sealing and to avoid fuel leak hazards. Always depressurize the fuel system before beginning work.