Walker 350-34291 Oxygen Sensor - Upstream

Walker 350-34291 Oxygen Sensor Overview

Walker Products 350-34291 is a heated oxygen sensor built as a specific-fit OE replacement for select Chrysler and Dodge applications. It is engineered to deliver the feedback the ECU needs for accurate fuel control, emissions monitoring, and fault detection.

Compatible With 2001-2003 Chrysler Town & Country, upstream; 2001-2003 Chrysler Voyager, upstream; 2001-2002 Chrysler Grand Voyager, upstream; 2001-2003 Dodge Caravan, upstream; and 2001-2003 Dodge Grand Caravan, upstream.

Key Features

• Heated oxygen sensor design for faster operating temperature
• Specific fitment for the listed upstream applications
• 4-wire configuration with 20-gauge wiring
• Female connector with radiused polygon shape
• Threaded mounting type with 18.0 mm thread diameter
• Overall length: 16.26 in.; wiring harness length: 12.72 in.

Product Details

The Walker Products Aftermarket line focuses on engine management and oxygen/air-fuel sensors engineered for OE-style replacement across a wide range of vehicles. Part number 350-34291 is application-specific, meaning the sensor position, connector style, and feedback characteristics are matched to the vehicle’s upstream oxygen sensor location. For Chrysler Town & Country, Chrysler Voyager, Dodge Caravan, and Dodge Grand Caravan models in the listed years, this sensor supports the ECU’s ability to monitor exhaust oxygen content and adjust air-fuel strategy.

This part cross-references no listed interchange numbers for the same application.

What It 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 readings
• Higher exhaust emissions from a failing upstream sensor
• Stored ECU fault codes tied to the sensor circuit or related systems

Installation Notes

Install in the upstream oxygen sensor position only for the listed vehicles. Before replacement, inspect the sensor wiring harness and connector for heat damage, abrasion, or corrosion, since physical damage can shorten service life. Confirm thread size, connector shape, and harness length against the original part 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 quality systems. The brand has supplied engine management and fuel system components since 1946.