Walker 350-34452 Oxygen Sensor - Downstream or Upstream

Walker 350-34452 Oxygen Sensor for Montero Sport

Walker Products 350-34452 is a heated oxygen sensor built as a specific-fit OE-style replacement for select Mitsubishi applications. It is engineered for the correct mounting position and ECU feedback, making it a direct choice for Mitsubishi Montero and Montero Sport oxygen sensor service.

Key Features

• Heated oxygen sensor for faster operating temperature response
• Specific fit design for the listed Mitsubishi Montero and Montero Sport applications
• 4-wire configuration with a 20-gauge harness
• Threaded mounting with 18.0 mm thread diameter
• Radiused polygon male connector for application-specific connection
• Wiring harness length: 16.26 in.; overall length: 19.8 in.

Walker Products Engine Management Line

Walker Products Aftermarket focuses on engine management and oxygen/air-fuel sensors engineered as OE replacement parts for a wide range of vehicles. The 350-34452 follows that approach with application-specific fitment, sensor positioning, and feedback characteristics intended to match the vehicle’s ECU requirements.

Detailed Description

This Walker 350-34452 oxygen sensor is a heated, threaded sensor designed for direct replacement in select Mitsubishi Montero and Mitsubishi Montero Sport models. It is listed for upstream and downstream positions depending on year, emissions package, and engine management configuration. For buyers searching for a 1992-1999 Mitsubishi Montero oxygen sensor or a 1997-1999 Mitsubishi Montero Sport upstream oxygen sensor, this part number provides a fitment-specific solution.

Walker Products manufactures this sensor for the exact application, fitment position, and diagnostic feedback expected by the ECU. That makes it a practical choice when replacing a sensor that has triggered fault codes, poor engine performance, higher fuel consumption, increased exhaust emissions, or a malfunction indicator light.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Rough running or poor fuel control caused by a failing sensor
• Increased fuel consumption from incorrect air-fuel feedback
• Elevated exhaust emissions from degraded sensor response
• Fault codes stored in the ECU for upstream or downstream sensor circuits

Installation Notes and Fitment

Fits 1997-1999 Mitsubishi Montero Sport, upstream, Bank 1 Sensor 1 for non-California emissions certified vehicles. Fits 1997-1999 Mitsubishi Montero Sport, downstream, Bank 1 Sensor 2 for California emissions and California-ESV applications. Fits 1995-1996 Mitsubishi Montero, upstream for non-California ESV vehicles. Fits 1992-1994 Mitsubishi Montero, upstream.

• Inspect the sensor, wiring harness, and connector for physical damage before installation.
• Confirm the vehicle’s emissions certification and sensor position before ordering.
• Use the listed threaded mounting and connector style to verify application match.
• Check ECU fault codes to confirm whether the upstream or downstream sensor is affected.

Quality Assurance

Walker Products is an Automotive ISO9001/TS 16949 certified company with long-standing experience in engine management components. Part number 350-34452 is built for application-specific fitment and diagnostic performance consistent with the vehicle’s original sensor requirements.