Walker 350-64055 Oxygen Sensor - Upstream

Walker 350-64055 Oxygen Sensor for Honda and Acura

Walker Products 350-64055 is a heated upstream oxygen sensor built as an OE-style replacement for specific Honda and Acura applications. It is engineered for the correct fitment position and ECU feedback, helping maintain accurate air-fuel monitoring on vehicles that rely on a Bank 1 Sensor 1 upstream sensor.

Key Features

• Heated oxygen sensor for upstream installation
• Specific-fit design for targeted Honda Civic, Honda CR-V, and Acura RSX applications
• 4-wire configuration with a 20-gauge harness
• Radiused polygon male connector for application-specific connection
• Threaded mounting with 18.0 mm thread diameter
• Overall length: 14.88 in; wiring harness length: 11.34 in

Product Details

Walker Products Aftermarket focuses on engine management and oxygen/air-fuel sensors developed as replacement parts for original equipment applications. Part number 350-64055 is designed for upstream use where the ECU depends on precise sensor feedback to manage fuel delivery and emissions performance. This sensor is listed for 2001-2005 Honda Civic, 2002-2004 Honda CR-V, and 2002-2004 Acura RSX applications, with fitment notes that include Bank 1 Sensor 1 and California-emissions-specific coverage on select Civic models. This part cross-references Walker Products Aftermarket 350-64055 for the same application.

What It Helps Address

• Check engine light related to upstream oxygen sensor faults
• Poor engine performance caused by incorrect air-fuel readings
• Increased fuel consumption from inaccurate sensor feedback
• Higher exhaust emissions from a failing oxygen sensor
• Fault codes stored in the ECU for Bank 1 Sensor 1 or upstream sensor issues

Installation Notes and Tips

• Confirm the vehicle’s emissions calibration before ordering, especially for 2003-2005 Honda Civic models with California or non-California notes.
• Verify the connector shape, wire count, and threaded mounting style against the original sensor.
• Inspect the sensor wiring harness and connector for damage before installation.
• Use the listed upstream position only; do not substitute for downstream locations.

Quality Assurance

Walker Products states that its engine management sensors are manufactured under Automotive ISO9001/TS 16949 quality systems and developed for OE replacement use. Since 1946, the Walker Products Aftermarket line has focused on engine management and fuel system components for vehicle-specific applications.

Fitment

• Fits 2001-2005 Honda Civic, upstream
• Fits 2004-2005 Honda Civic, upstream
• Fits 2003-2005 Honda Civic, upstream
• Fits 2002-2004 Acura RSX, upstream
• Fits 2002-2004 Honda CR-V, upstream
• Fits 2003 Honda Civic, upstream