Walker 350-34238 Oxygen Sensor - Upstream

Walker 350-34238 Oxygen Sensor for Montero Sport

Walker Products 350-34238 is a heated oxygen sensor built as a specific-fit replacement for select Mitsubishi Montero Sport applications. It is engineered for upstream placement and provides the ECU with the feedback needed for fuel control and emissions monitoring.

Key Features

• Heated oxygen sensor for faster operating response
• Specific fit for the listed Mitsubishi Montero Sport applications
• Upstream position for engine management feedback
• 4-wire design with 22-gauge wiring
• Threaded mounting with 18.0 mm thread diameter
• Radiused polygon male connector for application-specific connection
• Wiring harness length: 10.35 in.; overall length: 13.9 in.

Application Details

Compatible with 1997-2000 Mitsubishi Montero Sport, upstream, including non-California ESV vehicles. Walker Products Aftermarket 350-34238 is built for the sensor location and connector style required by the vehicle, helping maintain the diagnostic feedback the ECU expects from the upstream oxygen sensor circuit. Walker Products Aftermarket focuses on OE-style engine management and oxygen/air-fuel sensor replacements for a wide range of vehicles, and this part follows that application-specific approach.

What It Helps Address

• Check engine light related to upstream oxygen sensor performance
• Poor fuel economy caused by incorrect air-fuel feedback
• Rough engine operation from inaccurate exhaust oxygen readings
• Higher exhaust emissions from a failing sensor
• Stored ECU fault codes tied to the oxygen sensor circuit

Installation Notes

Verify the upstream sensor location, connector shape, and thread size before installation. Inspect the sensor wiring harness and connector for heat damage, corrosion, or physical wear, since damaged wiring can shorten sensor life and affect signal quality. Confirm the vehicle is one of the listed 1997-2000 Mitsubishi Montero Sport applications before ordering.

Quality Assurance

Walker Products has supplied engine management and fuel system components since 1946 and operates under Automotive ISO9001/TS 16949 certification. The 350-34238 is manufactured as an OE-style replacement for the specified application and is intended to deliver the diagnostic feedback required by the ECU.