Walker 350-34449 Oxygen Sensor - Upstream

Walker Oxygen Sensor for Mitsubishi Applications

Walker Products part number 350-34449 is a heated oxygen sensor built as a specific-fit OE replacement for select Mitsubishi vehicles. It is engineered to provide the ECU with the feedback needed for proper fuel control and emissions monitoring on covered applications.

For Mitsubishi Eclipse and Mitsubishi Galant upstream locations, this Walker Products Aftermarket sensor is matched to the application, connector style, and threaded mounting design used by the vehicle.

Key Features

• Heated oxygen sensor for upstream exhaust monitoring
• Specific-fit design for direct application matching
• 4-wire configuration with 20-gauge wiring
• Radiused polygon male connector for vehicle-specific connection
• Threaded mounting with 18.0 mm thread diameter
• Wiring harness length: 15.67 in.; overall length: 19.21 in.

Product Details

Walker Products 350-34449 is part of the Walker Products Aftermarket engine management line, which focuses on OE-style replacement sensors for a wide range of vehicles. This oxygen sensor is designed for upstream use and is built to deliver the diagnostic feedback the ECU expects on the listed Mitsubishi Eclipse, Mitsubishi Galant, and Mitsubishi Grandis applications. The heated design helps the sensor reach operating temperature quickly for stable signal output during normal engine operation.

Fits 2006-2012 Mitsubishi Eclipse, upstream. Fits 2012 Mitsubishi Galant, upstream. Fits 2007-2011 Mitsubishi Galant, upstream. Fits 2007-2009 Mitsubishi Grandis, upstream left. Fits 2004-2006 Mitsubishi Galant, upstream.

Common Issues This Sensor May Address

• Check engine light related to oxygen sensor performance
• Rough engine operation caused by incorrect air-fuel feedback
• Increased fuel consumption from inaccurate exhaust readings
• Higher exhaust emissions on affected Mitsubishi applications
• Stored ECU fault codes tied to the upstream sensor circuit

Installation Notes

Before replacement, inspect the sensor wiring harness and connector for heat damage, abrasion, or corrosion. Confirm the upstream location, thread size, connector shape, and wire count match the original part on the vehicle. On Mitsubishi Eclipse and Mitsubishi Galant applications, verify the cylinder-bank and position notes in the fitment data before installation.

Quality Assurance

Walker Products states that its engine management and oxygen/air-fuel sensors are developed as OE replacement parts and manufactured under Automotive ISO9001/TS 16949 certification standards. Part number 350-34449 is built for the specified fitment and ECU feedback requirements of the listed vehicles.