Walker 350-34685 Oxygen Sensor

Walker 350-34685 Oxygen Sensor for OE-Style Replacement

Walker Products 350-34685 is a heated oxygen sensor built for specific vehicle applications and exact mounting positions. It is engineered as an OE-style replacement for vehicles that rely on accurate exhaust feedback to the ECU, including Saab 9-3, Buick Rendezvous, Cadillac CTS, and Saturn Vue applications.

Key Features

• Heated oxygen sensor with specific fitment for the listed applications
• 4-wire design with a female connector and radiused polygon connector shape
• Threaded mounting type with 18.0 mm thread diameter
• Wiring harness length: 13.31 in; overall length: 16.85 in
• Built for downstream and upstream positions where listed
• Walker Products Aftermarket part number 350-34685

Product Details

This Walker oxygen sensor is designed to provide the ECU with the exhaust signal needed for fuel control and emissions monitoring. The specific-fit design helps ensure correct placement on the vehicle, whether the application calls for an upstream right, upstream left, downstream right, downstream left, upstream front, upstream rear, downstream front, or downstream rear sensor. For shoppers searching for a Walker 350-34685 oxygen sensor for Saab 9-3 downstream replacement or a Cadillac CTS upstream oxygen sensor, this part matches the listed position-specific applications.

Walker Products’ Engine Management and Oxygen/Air-Fuel sensor line is focused on OE replacement coverage for many vehicles worldwide. The brand’s application-specific approach means each sensor is built around the required fitment position and diagnostic feedback expected by the vehicle’s control system. This part number, 350-34685, is part of that product line and is intended for direct replacement use on the confirmed applications below.

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

What It Helps Address

• Check engine light related to oxygen sensor performance
• Poor engine operation caused by incorrect exhaust feedback
• Increased fuel consumption from inaccurate air-fuel readings
• Higher exhaust emissions from a failing sensor
• Fault codes stored in the ECU for the affected sensor circuit

Installation Notes

• Install only in the exact position shown for the vehicle: upstream or downstream, and left/right/front/rear where specified.
• Inspect the sensor wiring harness and connector for damage before installation.
• Check the exhaust bung threads and sensor mounting area for contamination or wear.
• Confirm the connector shape and wire count match the original sensor before replacement.
• Use the vehicle’s service information for torque and diagnostic reset procedures.

Quality Assurance

Walker Products manufactures engine management sensors under ISO 9001/TS 16949 quality systems. The 350-34685 oxygen sensor is built for the listed OE-style applications and position-specific fitment requirements.

Vehicle Fitment

• Fits 2006-2009 Saab 9-3, downstream.
• Fits 2004 Buick Rendezvous, downstream.
• Fits 2003-2004 Cadillac CTS, upstream right.
• Fits 2003-2004 Cadillac CTS, upstream left.
• Fits 2003-2004 Cadillac CTS, downstream right.
• Fits 2003-2004 Cadillac CTS, downstream left.
• Fits 2002-2003 Saturn Vue, upstream rear.
• Fits 2002-2003 Saturn Vue, upstream front.
• Fits 2002-2003 Saturn Vue, downstream rear.
• Fits 2002-2003 Saturn Vue, downstream front.