Walker 350-64038 Oxygen Sensor - Upstream

Walker 350-64038 Oxygen Sensor for Volvo S70 and V70

Walker Products 350-64038 is a specific-fit heated oxygen sensor engineered for upstream placement on select 1999-2000 Volvo S70 and Volvo V70 models. It is built to deliver the ECU feedback needed for accurate fuel control and emissions monitoring.

Key Features

• Specific-fit oxygen sensor for confirmed Volvo applications
• Heated sensor design for faster operating temperature
• 4-wire configuration with male radiused polygon connector
• Threaded mounting with 18.0 mm thread diameter
• Wiring harness length: 18.23 in.; overall length: 21.77 in.
• Walker Products Aftermarket line for engine management and oxygen/air-fuel sensor replacement

Product Details

Walker Products 350-64038 is an OE-style replacement oxygen sensor for upstream use on the 1999-2000 Volvo S70 and 1999-2000 Volvo V70. As a heated sensor, it helps the engine management system reach closed-loop operation efficiently, supporting proper air-fuel ratio control and emissions feedback. The specific-fit design matches the intended application, position, connector style, and threaded mount for a direct replacement approach.

Walker Products Aftermarket focuses on engine management and oxygen/air-fuel sensors developed for replacement use across many vehicle platforms. This part number is built for the upstream location on Volvo S70 and Volvo V70 applications and is identified as Walker Products 350-64038.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Rough running caused by incorrect air-fuel feedback
• Increased fuel consumption from inaccurate sensor readings
• Higher exhaust emissions from poor mixture control
• Fault codes stored in the ECU for the affected sensor circuit

Installation Notes and Tips

Install Walker 350-64038 in the upstream oxygen sensor position only on the listed Volvo S70 and V70 applications. Before replacement, inspect the sensor wiring harness and connector for heat damage, abrasion, or corrosion, since damaged wiring can shorten sensor life and affect ECU feedback. Confirm thread size, connector shape, and harness routing before installation.

Quality Assurance

Walker Products is an Automotive ISO9001/TS 16949 certified company with a long history in engine management components dating back to 1946. The 350-64038 is manufactured as a specific application replacement to support the diagnostic and emissions requirements of the vehicle ECU.