Walker 350-34603 Oxygen Sensor - Downstream Left or Downstream Right

Walker 350-34603 Oxygen Sensor Overview

Walker Products 350-34603 is a heated, specific-fit oxygen sensor engineered as an OE-style replacement for select Land Rover applications. It is built for downstream monitoring and provides the ECU with the feedback needed to track exhaust efficiency and sensor performance.

Compatible With 2007-2009 Land Rover LR3 and 2007-2009 Land Rover Range Rover Sport in downstream left and downstream right positions, this sensor is a direct-fit solution for the listed applications.

Key Features

• Heated oxygen sensor for faster operating temperature and stable signal output
• Specific-fit design for the listed Land Rover applications
• 4-wire configuration with a male connector
• Threaded mounting type with 18.0 mm thread diameter
• 7.4 in. wiring harness length and 10.94 in. overall length
• Radiused polygon connector shape for application-specific fitment

Product Details

Walker Products Aftermarket focuses on engine management and oxygen/air-fuel sensors developed for OE replacement use. Part number 350-34603 is manufactured for the specified application and fitment position, helping the vehicle’s ECU receive the correct diagnostic feedback from the downstream exhaust stream. For 2007-2009 Land Rover LR3 and 2007-2009 Land Rover Range Rover Sport, this sensor is listed for both downstream left and downstream right positions. The Walker 350-34603 is a practical choice when replacing a failed downstream oxygen sensor on these vehicles.

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

What It Helps Address

• Check engine light related to downstream oxygen sensor performance
• Poor fuel economy caused by inaccurate exhaust feedback
• Rough engine operation tied to sensor signal issues
• Higher exhaust emissions from a degraded oxygen sensor
• Fault codes stored in the ECU for affected sensor circuits

Installation Notes

Verify the vehicle position before ordering: this listing is for downstream left and downstream right applications only. Inspect the sensor wiring harness and connector for heat damage, abrasion, or corrosion before installation, since physical damage can shorten sensor life. Confirm thread size, connector style, and harness routing match the original part on the vehicle.

Quality Assurance

Walker Products has been producing engine management and fuel system components since 1946 and operates as an ISO 9001 / TS 16949 certified company. Part number 350-34603 is built as a specific application replacement for the listed Land Rover fitments.