Walker 350-64049 Oxygen Sensor - Upstream Left or Upstream Right

Walker Oxygen Sensor for Volvo Upstream Applications

Walker Products Part Number 350-64049 is a heated oxygen sensor built for specific upstream positions on select Volvo models. It is engineered as an OE-style replacement to deliver the ECU feedback needed for proper fuel control and emissions monitoring.

Compatible With 2005-2011 Volvo XC90 and 2007-2010 Volvo S80 upstream right or upstream left applications, this sensor is a direct-fit option for targeted repair work. Walker Products Aftermarket focuses on application-specific engine management sensors, and the 350-64049 follows that approach with the correct connector, wiring, and mounting style for the listed vehicles.

Key Features

• Walker Products Aftermarket oxygen sensor, Part Number 350-64049
• Heated sensor design for faster operating response
• Specific fit for listed Volvo upstream positions
• 4-wire configuration with 20-gauge wiring
• Radiused polygon male connector
• Threaded mounting with 18.0 mm thread diameter
• Wiring harness length: 28.07 in.; overall length: 31.61 in.

Detailed Description

This Walker oxygen sensor is designed for upstream installation on the Volvo XC90 and Volvo S80, where accurate exhaust oxygen feedback is used by the ECU to manage air-fuel ratio and emissions strategy. The heated sensor design helps the system reach operating temperature more quickly, which supports stable sensor feedback during normal driving conditions. Part number 350-64049 is built for specific fitment rather than universal use, making it a practical replacement when the original sensor has failed or the connector and harness match the listed application.

Walker Products has long supplied engine management and oxygen/air-fuel sensors for OE replacement use, and this part reflects that application-specific approach. If your Volvo S80 or XC90 has an upstream sensor fault, this unit is intended for the exact positions shown in the fitment data, including upstream right and upstream left locations.

What It Helps Address

• Check engine light related to upstream oxygen sensor performance
• Poor fuel economy caused by incorrect air-fuel feedback
• Rough engine operation from inaccurate exhaust sensing
• Elevated exhaust emissions from a failing sensor
• Stored ECU fault codes tied to the oxygen sensor circuit

Installation Notes and Tips

• Verify the vehicle position before ordering: Fits 2005-2011 Volvo XC90, upstream right or upstream left.
• Verify the vehicle position before ordering: Fits 2008-2010 Volvo S80, upstream right or upstream left.
• For 2007 Volvo S80, confirm the chassis/VIN break and the correct upstream side before installation.
• Inspect the sensor wiring harness and connector for heat damage, abrasion, or corrosion before replacement.
• Confirm the threaded mounting location and connector shape match the original sensor.

Quality Assurance

Walker Products manufactures engine management sensors as OE replacement components for specific applications and supports them with ISO 9001/TS 16949 certified manufacturing practices. Part Number 350-64049 is built to match the listed Volvo fitment and diagnostic requirements.