Walker 250-54056 Oxygen Sensor - Upstream

OE Oxygen Sensor for Honda S2000

Walker Products OE 250-54056 is a heated, specific-fit oxygen sensor engineered as an OE-style replacement for the correct upstream position. It is built for vehicles that rely on accurate exhaust feedback to help the ECU manage fuel delivery and emissions.

Fits 2006-2009 Honda S2000, upstream. Fits 2006-2009 Honda S2000, upstream Bank 1 Sensor 1.

Key Features

• Heated oxygen sensor for faster operating response
• Specific-fit design for the upstream location
• 4-wire configuration with 20-gauge wiring
• 18.0 mm threaded mounting type
• Radiused polygon male connector for application-specific fitment
• Overall length: 21.77 in.; wiring harness length: 18.23 in.

Product Details

Walker Products OE 250-54056 is designed for the upstream oxygen sensor position on the 2006-2009 Honda S2000, including Bank 1 Sensor 1 applications. As part of the Walker Products OE line, this sensor follows application-specific fitment requirements so the ECU receives the exhaust feedback needed for proper engine management. The heated design helps the sensor reach operating temperature quickly, which is important for accurate signal delivery during cold starts and normal driving.

This part number, 250-54056, is intended for direct replacement use where the original sensor has failed or is no longer reporting correctly. Walker Products has long focused on engine management and oxygen/air-fuel sensor applications for OE-style replacement needs.

Common Issues This Sensor Can Address

• Check engine light related to upstream oxygen sensor faults
• Poor fuel economy caused by inaccurate exhaust feedback
• Rough engine operation from incorrect air-fuel correction
• Higher exhaust emissions from a failing sensor signal
• Stored ECU fault codes tied to Bank 1 Sensor 1

Installation Notes

Confirm the vehicle uses the upstream oxygen sensor position before ordering. Inspect the sensor wiring harness and connector for heat damage, corrosion, or broken terminals before installation. Because this is a threaded sensor, verify thread size and connector style match the original unit. For best results, clear any stored fault codes after replacement and verify the repair with a scan tool.

Quality Assurance

Walker Products states that its engine management sensors are developed as OE replacement parts and manufactured under ISO 9001/TS 16949 quality systems. The Walker Products OE 250-54056 is built to support the diagnostic feedback expected by the ECU in the listed Honda S2000 applications.