Walker 350-34091 Oxygen Sensor

Walker Oxygen Sensor for Saab and Volvo

Walker Products 350-34091 is a specific-fit heated oxygen sensor engineered for OE-style replacement on select Saab and Volvo applications. It is built to provide the ECU with the correct diagnostic feedback for downstream and upstream positions, helping maintain proper fuel control and emissions monitoring.

Key Features

• Heated oxygen sensor for faster operating response
• Specific fitment for select Saab 9-5, Saab 9000, Volvo S90, Volvo V90, and Volvo 960 applications
• Threaded mounting type with 18.0 mm thread diameter
• 4-wire design with 20-gauge wiring
• Radiused polygon male connector for application-specific connection
• Wiring harness length: 66.46 in; overall length: 70.0 in
• Walker Products Aftermarket engine management sensor line

Product Details

Walker Products Aftermarket focuses on engine management and oxygen/air-fuel sensors built as direct replacement parts for specific vehicle applications. Part number 350-34091 is designed for the correct sensor location and fitment position, including downstream and upstream service on listed Saab and Volvo models. This matters because the ECU relies on accurate sensor feedback to manage air-fuel ratio, monitor emissions performance, and store fault information when a sensor or related circuit is not operating correctly. The 350-34091 oxygen sensor is listed for Fits 2000 Saab 9-5, downstream; Fits 1999 Saab 9-5, downstream; Fits 1997-1998 Volvo S90, upstream; Fits 1997-1998 Volvo V90, upstream; Fits 1996-1997 Saab 9000, downstream rear; Fits 1996-1997 Saab 9000, downstream front; and Fits 1995-1997 Volvo 960, upstream. This part number, 350-34091, is intended for vehicles where the sensor location and connector style must match the original application.

Common Issues This Sensor May Address

• Check engine light or malfunction indicator light related to oxygen sensor performance
• Poor engine operation caused by inaccurate exhaust feedback
• Increased fuel consumption from incorrect air-fuel control
• Higher exhaust emissions from a failing sensor signal
• Stored ECU fault codes tied to the affected sensor circuit

Installation Notes

Verify the sensor position before installation, since this application includes downstream, upstream, downstream rear, and downstream front locations across different vehicles. Inspect the wiring harness and connector for physical damage before replacement, and confirm the connector shape, wire count, and thread size match the original part. For Saab 9-5, Saab 9000, Volvo S90, Volvo V90, and Volvo 960 applications, correct placement is important for proper ECU feedback and emissions system operation.

Quality Assurance

Walker Products has produced engine management and fuel system components since 1946 and operates as an Automotive ISO9001/TS 16949 certified company. The 350-34091 oxygen sensor is manufactured for specific application fitment and diagnostic system feedback requirements.