Walker 250-54045 Oxygen Sensor - Upstream

OE Oxygen Sensor for Honda Accord

Walker Products OE 250-54045 is a heated, specific-fit oxygen sensor engineered for precise feedback to the ECU. It is built for the upstream position on select 2003-2007 Honda Accord applications, including Bank 1 Sensor 1 service needs.

Walker Products OE focuses on original-equipment-style replacement sensors for vehicle-specific fitment and diagnostic accuracy. This oxygen sensor is designed around the application, connector style, and mounting position required for the vehicle, helping restore proper exhaust monitoring on the Honda Accord.

Key Features

• Heated oxygen sensor for faster operating response
• Specific-fit design for direct application matching
• Upstream mounting position
• 4-wire configuration with female connector
• 18.0 mm threaded mounting type
• Radiused polygon connector shape
• 14.29 wiring harness length and 20-gauge wire
• Walker Products OE part number 250-54045

Detailed Description

Walker Products OE 250-54045 is an emission control oxygen sensor made for select Honda Accord models from 2003 through 2007. As an upstream heated sensor, it monitors exhaust oxygen content before the catalytic converter and sends the ECU the feedback needed for fuel control and emissions management. The specific-fit design helps ensure the sensor matches the intended mounting position and connector layout for the vehicle.

This part number is a direct replacement choice for drivers searching for a 2003-2007 Honda Accord upstream oxygen sensor, Honda Accord Bank 1 Sensor 1 oxygen sensor, or Walker Products OE 250-54045. It is also relevant for front oxygen sensor replacement on supported Accord applications.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Poor engine operation caused by incorrect air-fuel feedback
• Increased fuel consumption from inaccurate exhaust readings
• Higher exhaust emissions from a failing upstream sensor
• Stored ECU fault codes tied to the affected sensor circuit

Installation Notes and Tips

Verify the vehicle’s year, model, and upstream position before installation. Inspect the sensor wiring harness and connector for heat damage, abrasion, or corrosion, since physical damage can shorten service life and affect operation. Confirm the threaded mounting style and connector shape match the original sensor before replacement.

Fits 2003-2007 Honda Accord, upstream. Fits 2003-2007 Honda Accord, upstream front oxygen sensor applications. Part number 250-54045 should be matched to the vehicle’s ECU fault code and sensor location for correct service.

Quality Assurance

Walker Products states that its engine management and oxygen/air-fuel sensors are developed as OE replacement parts and manufactured under ISO 9001/TS 16949 quality systems. Walker Products OE 250-54045 reflects that application-specific approach for supported Honda Accord fitments.