Walker 350-33020 Oxygen Sensor - Upstream

Walker 350-33020 Oxygen Sensor Overview

Walker Products 350-33020 is a heated oxygen sensor built as a specific-fit OE-style replacement for select Jeep applications. It is engineered to provide the ECU with the exhaust feedback needed for proper fuel control and emissions monitoring.

Compatible With 1986-1990 Jeep Comanche, 1987-1990 Jeep Cherokee, 1987-1990 Jeep Wrangler, and 1987 Jeep Wagoneer in the upstream position, this sensor is a direct-fit option for common front oxygen sensor service needs.

Key Features

• Heated oxygen sensor for faster operating response
• Specific-fit design for the listed Jeep applications
• Upstream mounting position for bank 1 sensor 1 service
• Threaded mount with 18.0 mm thread diameter
• 3-wire design with 20-gauge wiring
• Radiused polygon male connector for application-specific connection
• Wiring harness length: 8.39 in.; overall length: 11.93 in.

Detailed Description

The Walker Products Aftermarket line focuses on engine management and oxygen/air-fuel sensors developed as replacement parts for original equipment applications. Part number 350-33020 is built for the specified fitment position and is intended to deliver the diagnostic feedback the ECU expects from the upstream sensor. For Jeep Cherokee, Jeep Comanche, Jeep Wrangler, and Jeep Wagoneer models listed below, this sensor supports accurate exhaust monitoring at the front of the exhaust stream.

Walker Products has supplied engine management and fuel system components since 1946 and manufactures to automotive ISO 9001/TS 16949 standards. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

What It Helps Address

• Check engine light related to upstream oxygen sensor faults
• Poor engine performance caused by incorrect air-fuel feedback
• Increased fuel consumption from inaccurate exhaust readings
• Higher exhaust emissions from a failing sensor
• Physical damage concerns at the sensor, connector, or wiring harness

Installation Notes

Confirm the upstream location before installation and verify connector shape, thread diameter, and harness length against the original part. Inspect the sensor wiring and connector for heat damage, corrosion, or abrasion before replacement. If the ECU has stored fault codes, clear them after installation and verify proper sensor operation.

Quality Assurance

Walker Products manufactures this oxygen sensor as a specific application replacement for the listed Jeep vehicles and positions. The part is produced under ISO 9001/TS 16949 quality systems and is backed by Walker Products' long-standing engine management component expertise.