Walker 350-34644 Oxygen Sensor

Walker 350-34644 Oxygen Sensor Overview

Walker Products 350-34644 is a heated, specific-fit oxygen sensor engineered as an OE-style replacement for select Mitsubishi applications. It is built for the correct mounting position and ECU feedback requirements, helping restore accurate exhaust monitoring on vehicles such as the Mitsubishi Lancer, Eclipse, Galant, Diamante, Outlander, Expo, and Expo LRV.

Walker Products Aftermarket focuses on engine management and oxygen/air-fuel sensors for precise application matching. The 350-34644 follows that approach with a threaded, male-connector design and vehicle-specific fitment for downstream and upstream positions where listed.

Key Features

• Heated oxygen sensor for faster operating response
• Specific-fit design for listed Mitsubishi applications
• 4-wire configuration with 20-gauge wiring
• Radiused polygon male connector for proper harness connection
• Threaded mounting with 18.0 mm thread diameter
• Wiring harness length: 19.21 in.; overall length: 22.76 in.

Detailed Description

The Walker 350-34644 oxygen sensor is designed to replace the original sensor on select Mitsubishi models where accurate air-fuel feedback is required by the ECU. It is listed for downstream and upstream positions across 1993-2007 Mitsubishi Lancer, Eclipse, Galant, Diamante, Outlander, Expo, and Expo LRV applications, including specific California and non-California emissions configurations. If your vehicle has a check engine light, poor fuel economy, elevated emissions, or drivability concerns tied to oxygen sensor fault codes, this part provides the correct application-specific replacement path.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

What It Helps Address

• Check engine light related to oxygen sensor faults
• Incorrect fuel mixture readings from a worn sensor
• Reduced fuel economy caused by inaccurate exhaust feedback
• Higher exhaust emissions from delayed or faulty sensor response
• Poor engine performance tied to upstream or downstream sensor failure

Installation Notes and Tips

• Confirm the exact position before ordering: downstream, upstream, upstream front, upstream rear, downstream front, or downstream rear as listed.
• Verify emissions calibration, especially for California and non-California applications on Mitsubishi Eclipse, Galant, and Diamante models.
• Inspect the sensor connector, wiring harness, and nearby exhaust wiring for heat damage or corrosion before installation.
• Use the vehicle’s ECU fault codes and physical sensor location to match the correct application.

Quality Assurance

Walker Products has supplied engine management components since 1946 and operates as an Automotive ISO 9001 / TS 16949 certified company. The 350-34644 is manufactured for specific vehicle fitment and diagnostic feedback requirements, supporting reliable replacement on the listed Mitsubishi applications.