Subaru OEM Front Oxygen Sensor - A/F (09-10 WRX) | 22641AA420

Overview

The Genuine Subaru OEM Front Air/Fuel Ratio Oxygen Sensor (Part #22641AA420) is a factory-original replacement sensor designed specifically for the 2009–2010 Subaru WRX. As a direct OEM replacement, this A/F sensor ensures precise fuel mixture monitoring for optimal engine performance, fuel efficiency, and emissions compliance — with a guaranteed exact fit that aftermarket sensors simply cannot match.

Key Features & Benefits

• Genuine Subaru OEM Quality – Manufactured to Subaru's exact factory specifications, ensuring reliable performance and longevity you can count on.
• Exact-Fit Guarantee – Designed specifically for the 2009–2010 Subaru WRX; plug-and-play installation with no modifications required.
• Precise Air/Fuel Ratio Monitoring – Accurately measures exhaust oxygen content to help the ECU maintain the optimal fuel mixture for peak power and efficiency.
• Factory Warranty Coverage – Backed by Subaru's genuine parts warranty, giving you peace of mind with every purchase.
• Emissions System Integrity – Helps maintain proper emissions output and prevents check-engine codes related to upstream oxygen sensor faults.
• OEM Connector & Wiring – Features factory-matched connector and wiring harness length for a seamless, no-hassle installation.

What's Included

• 1x Genuine Subaru Front Air/Fuel Ratio Oxygen Sensor – Part #22641AA420

Specifications

Fitment & Compatibility

This sensor is confirmed to fit the following vehicles:

Note: Always verify your vehicle's VIN and existing part number before ordering to confirm fitment. This is the front (upstream) A/F sensor — ensure you are replacing the correct sensor position.

Installation

This Genuine Subaru A/F oxygen sensor is a direct plug-and-play replacement for the factory unit. Installation typically requires an oxygen sensor socket and basic hand tools. Clearing any related diagnostic trouble codes (DTCs) after installation is recommended. Professional installation by a certified Subaru technician is advised if you are unfamiliar with exhaust system components or sensor replacement procedures.