Walker 245-1304 Mass Air Flow Sensor

Walker Mass Air Flow Sensor for BMW

Restore accurate airflow measurement with the Walker Mass Air Flow Sensor, part number 245-1304. This OE-style replacement is built for select BMW applications and supports proper engine management on vehicles such as the BMW 550i, 650i, 750i, X5, and X6.

Walker Products has supplied fuel system and engine sensor components since 1946, with manufacturing and engineering processes focused on meeting or exceeding OEM standards. The Walker Mass Air Flow Sensor line is part of that broader engine management offering.

Key Features

• Mass air flow sensor for select BMW engine management systems
• Walker Mass Air Flow Sensor line from Walker Products
• OE-style replacement built to support accurate airflow signal output
• Application coverage for BMW 550i, 650i, 750i, X5, and X6 models
• Cross-references Delphi AF10421 and Standard Ignition MAS0412 for the same application
• Part number 245-1304 for easy identification

Detailed Description

The Walker 245-1304 mass air flow sensor is a direct-fit style replacement for select BMW vehicles from 2006-2014. It is used in engine management systems that rely on measured intake airflow to help the powertrain control module calculate fuel delivery and maintain drivability. Compatible applications include Fits 2008-2014 BMW X6, N/A; Fits 2006-2013 BMW 550i, N/A; Fits 2010-2013 BMW 550i GT, N/A; Fits 2010-2013 BMW 550i GT xDrive, N/A; Fits 2011-2013 BMW 550i xDrive, N/A; Fits 2012-2013 BMW 650i, N/A; Fits 2006-2010 BMW 650i, N/A; Fits 2013 BMW 650i Gran Coupe, N/A; Fits 2012-2013 BMW 650i xDrive, N/A; Fits 2013 BMW 650i xDrive Gran Coupe, N/A; Fits 2011-2013 BMW X5, N/A; Fits 2006-2012 BMW 750i, N/A; Fits 2010-2012 BMW 750i xDrive, N/A; Fits 2006-2012 BMW 750Li, N/A; Fits 2010-2012 BMW 750Li xDrive, N/A; and Fits 2006-2011 BMW 650Ci, N/A.

What It Helps Address

• Rough idle caused by inaccurate airflow readings
• Hesitation or poor throttle response
• Lean or rich fuel mixture concerns tied to sensor output
• Check engine light conditions related to mass air flow sensor performance
• Driveability issues on BMW 550i, 650i, 750i, X5, and X6 applications

Installation Notes and Tips

Confirm the connector style and engine application before installation. Inspect the intake tract, air filter housing, and wiring connector for contamination or damage that could affect sensor readings. After installation, clear diagnostic trouble codes and verify idle quality and throttle response during a road test.

Quality Assurance

Walker Products manufactures engine management components to meet or exceed OEM standards and specifications. The company is ISO 9001 and IATF 16949 certified, with in-house manufacturing, product management, engineering, and technical support resources focused on accurate part production and application coverage.

This part cross-references Delphi AF10421 and Standard Ignition MAS0412 for the same application.