Walker 350-64040 Oxygen Sensor - Upstream

Walker 350-64040 Upstream Oxygen Sensor

Walker Products 350-64040 is a specific-fit heated oxygen sensor engineered as an OE-style replacement for the correct application and ECU feedback. It is built for upstream placement and is used on select Honda and Acura models where accurate air-fuel monitoring is critical.

Compatible With 2003-2010 Honda Element, upstream; 2005-2006 Acura RSX, upstream; and 2005-2006 Honda CR-V, upstream. Walker Products Aftermarket focuses on engine management and oxygen/air-fuel sensors for application-specific fitment and diagnostic signal performance.

Key Features

• Part number: 350-64040
• Heated oxygen sensor for upstream placement
• Specific-fit design for the listed vehicle applications
• 4-wire configuration with 20-gauge wiring
• Threaded mounting with 18.0 mm thread diameter
• Radiused polygon male connector for proper harness connection
• Wiring harness length: 12.32 in.; overall length: 15.87 in.

Detailed Description

This Walker oxygen sensor is designed for vehicles that rely on upstream exhaust feedback to help the ECU manage fuel delivery and emissions control. The 350-64040 is a heated sensor, which helps it reach operating temperature faster for more consistent signal output during normal driving conditions. For drivers searching for a Honda Element upstream oxygen sensor, Acura RSX Bank 1 Sensor 1 replacement, or Honda CR-V front oxygen sensor, this part number matches the listed applications.

Walker Products Aftermarket builds engine management sensors as application-specific replacements, with attention to fitment position, connector style, and diagnostic feedback requirements. The 350-64040 is intended for the upstream location on the supported Honda and Acura models, including 2003-2010 Honda Element, 2005-2006 Acura RSX, and 2005-2006 Honda CR-V.

What It Helps Address

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

Installation Notes and Tips

Confirm the vehicle’s sensor position before ordering, since this part is for upstream applications only. Inspect the sensor wiring harness and connector for heat damage, abrasion, or corrosion before installation, and verify the threaded mounting point is clean and undamaged. If the vehicle has stored fault codes, diagnose the related circuit and exhaust system condition before replacing the sensor.

For fitment searches, this part is commonly referenced as a Honda Element upstream oxygen sensor, Acura RSX Bank 1 Sensor 1 oxygen sensor, and Honda CR-V front oxygen sensor. Part number 350-64040 should be matched to the exact application listed above.

Quality Assurance

Walker Products has produced engine management and fuel system components since 1946 and operates as an ISO 9001/TS 16949 certified company. The 350-64040 is manufactured for specific application fitment and diagnostic system feedback requirements.