Subaru OEM Oxygen Sensor Legacy GT 2009 / Outback XT 2009 | 22641AA42A

Overview

This Genuine Subaru OEM Air/Fuel Ratio Oxygen Sensor (Part #22641AA42A) is the factory-correct upstream O2 sensor designed specifically for the 2009 Subaru Legacy GT and 2009 Subaru Outback XT. As a direct OEM replacement, it restores precise fuel mixture monitoring, protects engine efficiency, and ensures your Legacy GT runs exactly as Subaru engineered it — no modifications, no guesswork, no compromise.

Key Features & Benefits

• Genuine Subaru OEM Part — Manufactured to factory specifications for a guaranteed exact fit and optimal performance, unlike aftermarket alternatives that may require modification or deliver inconsistent readings.
• Precise A/F Ratio Monitoring — Wideband air/fuel ratio sensor technology provides the ECU with accurate, real-time exhaust gas data, enabling precise fuel trim corrections and peak combustion efficiency.
• Protects Engine & Catalytic Converter — Accurate O2 sensor readings prevent rich or lean conditions that can cause engine misfires, poor fuel economy, and costly catalytic converter damage.
• Direct Plug-and-Play Fitment — Factory connector, thread pitch, and sensor body dimensions match OEM spec exactly — no adapters or wiring modifications required.
• Restores Factory Fuel Economy — A worn or failed A/F sensor degrades MPG and increases emissions; this OEM replacement restores the fuel efficiency your Legacy GT was designed to deliver.
• Backed by Subaru Quality Standards — Every Genuine Subaru part meets the same engineering and quality standards as the component originally installed at the factory.

What's Included

• 1x Genuine Subaru OEM Air/Fuel Ratio Oxygen Sensor (Part #22641AA42A)

Specifications

Fitment & Compatibility

This sensor is confirmed to fit the following Subaru vehicles. Always verify your specific model year and trim before ordering.

2009 Subaru Legacy GT

2009 Subaru Outback XT

Cross-reference: Subaru OEM Part Number 22641AA42A. If you are unsure of your vehicle's compatibility, reference your VIN or consult your owner's manual.

Installation

The 22641AA42A A/F ratio sensor is a direct OEM replacement designed for straightforward installation. Disconnect the factory wiring harness connector, remove the old sensor using an O2 sensor socket, apply anti-seize compound to the new sensor threads if not pre-applied, and torque to factory specification. While the procedure is accessible to experienced DIYers, professional installation by a certified Subaru technician is recommended to ensure correct torque and proper ECU reset/readiness monitoring.