Walker 1004-1039 Nitrogen Oxide (NOx) Sensor

Walker Genuine OE NOx Sensor Overview

Walker Genuine OE Part Number 1004-1039 is a specific-fit nitrogen oxide sensor for diesel and gasoline emission control systems. It is built with OE-style connectors, a square female connector, and an 890 mm wiring harness length for direct replacement service on supported applications.

For owners and technicians servicing emission systems on Ford F-250, Ford F-350, and similar diesel platforms, this NOx sensor helps maintain accurate exhaust gas monitoring in SCR-equipped vehicles. The Walker Genuine OE line focuses on OE-level fit, connector layout, and sensor construction for straightforward replacement.

Key Features

• Part Number: 1004-1039
• Brand Line: Walker Genuine OE
• Specific-fit NOx sensor for emission control service
• OE connector and harness length for direct replacement routing
• Square connector shape with black connector housing
• 4-terminal design with female connector and male terminals
• Gloss finish and multi-colored sensor body
• Built for SCR system NOx monitoring in diesel exhaust aftertreatment

Detailed Product Description

Walker Products Genuine OE NOx sensors are produced to meet the demands of modern emission systems, where accurate nitrogen oxide measurement is critical for SCR operation and aftertreatment performance. This sensor is manufactured to OE-level standards using materials and precision technology associated with Tier 1 OE suppliers. The result is a direct replacement solution for vehicles that require dependable exhaust gas sensing and stable communication with the emission control system.

Part number 1004-1039 is designed for specific applications and uses an OE-style connector layout to simplify replacement on supported Ford F-250 and Ford F-350 diesel configurations, along with other domestic and import vehicles in the Walker coverage range. This sensor supports proper NOx monitoring, which helps the vehicle manage emissions, protect downstream components such as diesel particulate filters, and maintain efficient engine operation.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

What This Sensor Helps Address

• Check engine lights related to NOx sensor performance
• SCR system faults caused by inaccurate exhaust gas readings
• Emission control issues affecting diesel aftertreatment operation
• Reduced efficiency from a failing nitrogen oxide sensor
• Downstream stress on diesel particulate filter and related components

Installation Notes and Tips

Verify connector shape, terminal count, and harness length before installation. This is a specific-fit sensor, so compare the OE connector style and routing path to the original unit before replacement. For Ford F-250 and Ford F-350 service, confirm the sensor location and exhaust system configuration against the vehicle’s original equipment specification.

Because NOx sensors operate in high-heat, vibration-prone exhaust environments, inspect the harness, connector, and mounting area for corrosion or heat damage during service. Use the vehicle’s service information for proper diagnostic confirmation before replacing the sensor.

Quality Assurance

Walker Genuine OE NOx sensors are built by Tier 1 OE suppliers and field-tested for demanding exhaust conditions, including heat, vibration, and corrosive environments. The product line is engineered for OE-level fit and reliable emission-system performance across a wide range of domestic and import applications.