Walker 350-34067 Oxygen Sensor - Downstream Left

Walker 350-34067 Oxygen Sensor for BMW X5

Walker Products 350-34067 is a heated oxygen sensor built as a direct-fit replacement for specific BMW applications. It is engineered for the downstream left position on 2004-2006 BMW X5 models and is designed to provide the ECU with the feedback needed for proper fuel control and emissions monitoring.

Key Features

• Specific-fit oxygen sensor for the downstream left location
• Heated sensor design for faster operating response
• 4-wire configuration with female connector
• Threaded mounting with 18.0 mm thread diameter
• 42.44 in. wiring harness length and 45.98 in. overall length
• Radiused polygon connector shape for application-specific fitment

Product Details

Walker Products Aftermarket 350-34067 is part of the Walker Products Engine Management and Oxygen/Air-Fuel sensor line, which focuses on OE-style replacement sensors for specific vehicle applications. This oxygen sensor is built for the 2004-2006 BMW X5, downstream left, and is intended to restore accurate exhaust feedback to the engine control unit. Walker Products has long supplied engine management sensors and fuel system components, and this part reflects that application-specific approach. This part number, 350-34067, is a direct replacement choice for BMW X5 owners addressing emissions-related sensor faults.

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

What It Helps Address

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

Installation Notes

Verify the downstream left position before installation on the BMW X5. Inspect the sensor wiring harness and connector for heat damage, abrasion, or corrosion, since physical damage can shorten sensor life. Confirm thread size and connector style match the original unit before threading the sensor into place.

Quality Assurance

Walker Products states that its engine management sensors are developed as OE replacement parts for specific applications and manufactured under Automotive ISO9001/TS 16949 quality systems. Part number 350-34067 is built to support the diagnostic feedback expected by the ECU on the listed BMW X5 applications.