Walker 350-34317 Oxygen Sensor - Center, Downstream or Upstream

Walker 350-34317 Oxygen Sensor for Mitsubishi

Walker Products 350-34317 is a heated oxygen sensor built as a specific-fit OE replacement for select Mitsubishi and Dodge applications. It is engineered to deliver the ECU feedback needed for accurate fuel control, emissions monitoring, and fault-code diagnosis.

Key Features

• Heated oxygen sensor with 4-wire design
• Specific-fit application for direct vehicle matching
• Threaded mounting with 18.0 mm thread diameter
• Female connector with radiused polygon shape
• 10.35 in. wiring harness length and 20-gauge wire
• Overall length: 13.9 in.
• Walker Products Aftermarket engine management sensor line

Product Details

Walker Products Aftermarket focuses on engine management and oxygen/air-fuel sensors engineered for OE-style replacement performance. Part number 350-34317 is designed for the specified sensor location and vehicle calibration needs, helping the ECU receive the correct signal for upstream, center, or downstream monitoring where listed. This part number is listed for Mitsubishi Eclipse, Mitsubishi Mirage, Mitsubishi Expo, Mitsubishi Expo LRV, Mitsubishi Sigma, Mitsubishi Galant, and Dodge Colt applications across the model years shown below.

This part cross-references no listed interchange part numbers in the provided data.

What This Sensor Helps Address

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

Installation Notes and Fitment

• Fits 1998-1999 Mitsubishi Eclipse, upstream, Bank 1 Sensor 1; non-California emissions certified.
• Fits 1996-1997 Mitsubishi Eclipse, upstream, Bank 1 Sensor 1.
• Fits 1995-1996 Mitsubishi Mirage, upstream, Bank 1 Sensor 1; non-California emissions certified.
• Fits 1995-1996 Mitsubishi Mirage, center, Calif-ESV, Bank 1 Sensor 2.
• Fits 1994-1995 Mitsubishi Expo, upstream, Bank 1 Sensor 1.
• Fits 1993-1994 Dodge Colt, downstream, Bank 1 Sensor 2 for California emissions.
• Fits 1994 Mitsubishi Expo LRV, upstream, Bank 1 Sensor 1.
• Fits 1994 Mitsubishi Mirage, upstream, Bank 1 Sensor 1.
• Fits 1993 Mitsubishi Expo, upstream, California-ESV.
• Fits 1993 Mitsubishi Expo LRV, upstream, California-ESV.
• Fits 1993 Mitsubishi Mirage, upstream, California-ESV.
• Fits 1989-1990 Mitsubishi Sigma, upstream, California emissions.
• Fits 1988 Mitsubishi Galant, upstream, California emissions.

Before installation, inspect the sensor, wiring harness, and connector for physical damage. Confirm the emissions calibration and sensor position on the vehicle, since California and non-California applications are listed separately. For Mitsubishi Eclipse and Mitsubishi Mirage service, verify Bank 1 Sensor 1, Bank 1 Sensor 2, or upstream position against the vehicle’s emissions label and diagnostic trouble codes.

Quality Assurance

Walker Products has manufactured engine management components since 1946 and operates as an Automotive ISO 9001/TS 16949 certified company. The Walker Products Aftermarket line is built around application-specific sensor fitment and ECU feedback requirements for modern diagnostic systems.