Walker 245-1389 Mass Air Flow Sensor

Walker Complete Assembly Mass Air Flow Sensor

Walker Complete Assembly Mass Air Flow Sensor Part Number 245-1389 is a direct replacement sensor and housing assembly for select Mercedes-Benz diesel applications. It is built as a new, tested unit with a black plastic housing, 2 connectors, 4 terminals, and male spade terminals for a factory-style connection.

Compatible With Mercedes-Benz GLE300d, GLK250, and ML250 applications, this Walker MAF sensor is designed for drivers who need accurate airflow measurement and a complete housing assembly replacement. The 245-1389 part number is also listed under interchange references 0890362 and 645090004880 for the same application.

Key Features

• Complete sensor and housing assembly
• 100% new, not remanufactured
• Programmed and tested for fit, form, and function
• Black plastic housing with oblong connector shape
• 2 connectors, 4 terminals, male connector gender
• Built by Walker Products, an ISO 9001 / IATF 16949 certified manufacturer
• Part number 245-1389 for application matching

Product Line Details

Walker’s Complete Assembly line includes both sensor-only and complete sensor-and-housing options. This configuration is the complete assembly style, which is often selected when the housing, connector area, or air tube condition needs to be addressed at the same time as the sensor.

Detailed Description

Walker Products manufactures mass air flow sensors with OEM-quality components and custom engineered circuit boards, and many of its high-demand parts are produced in USA facilities. The 245-1389 MAF sensor is calibrated and verified through production testing and on-vehicle testing to help maintain proper fuel trim performance across the airflow range. For Mercedes-Benz GLE300d, GLK250, and ML250 diesel models, this complete assembly provides a direct-fit replacement path when the original sensor assembly needs renewal.

What It Helps Address

• Rough idle caused by inaccurate airflow readings
• Check engine light related to mass air flow sensor faults
• Hesitation or poor throttle response
• Fuel trim issues from incorrect air measurement
• Driveability problems after contamination or sensor wear

Installation Notes and Tips

Before installation, inspect the intake tract and connector area for dirt, oil residue, or damage. Because this is a complete assembly, verify the housing orientation and electrical connector match the original unit before final tightening. Avoid touching the sensing element and confirm all intake clamps and seals are secure after installation. Fits 2016-2017 Mercedes-Benz GLE300d, N/A. Fits 2013-2015 Mercedes-Benz GLK250, N/A. Fits 2015 Mercedes-Benz ML250, N/A.

Quality Assurance

Walker Products states that this sensor is new, fully programmed, and tested before sale. The brand has supplied fuel system components since 1946 and operates as an ISO 9001 / IATF 16949 certified manufacturer.