Walker 245-2221 Mass Air Flow Sensor

Walker Mass Air Flow Sensor 245-2221

Restore accurate airflow measurement with the Walker Mass Air Flow Sensor 245-2221. This replacement sensor is built for direct-fit applications on select Audi and Volkswagen models, including Audi A3 Quattro, Audi TT Quattro, Volkswagen Eos, Volkswagen R32, Volkswagen Touareg, and Volkswagen Passat.

Walker Products has supplied fuel system and engine management components since 1946, with manufacturing and engineering support focused on OE-level fit and specification control. The Walker Mass Air Flow Sensor line is part of that broader engine sensor portfolio.

Key Features

• Part number 245-2221 mass air flow sensor for select import applications
• 5-terminal female connector
• Mounting hardware included
• Housing not included
• Direct replacement for vehicles requiring precise intake air measurement
• Cross-references Monroe Shocks & Struts MF21181 and MF21181N for the same application

Detailed Description

The Walker 245-2221 is a mass air flow sensor designed to measure incoming air so the engine control system can calculate fuel delivery more accurately. When the sensor signal becomes inconsistent, drivability and fuel control can suffer. This replacement part supports proper airflow input on compatible Audi and Volkswagen platforms, including 2002-2004 Volkswagen Passat, 2004-2006 Volkswagen Touareg, 2004-2006 Audi TT Quattro, 2004 Volkswagen R32, 2006-2009 Audi A3 Quattro, 2007-2008 Volkswagen Eos, 2008 Volkswagen R32, and 2008-2009 Audi TT Quattro.

Walker Products manufactures engine management components to meet or exceed OEM standards and specifications, with product engineering and technical support behind the cataloged application data. If you are searching for a Walker mass air flow sensor 245-2221 for Audi A3 Quattro or Volkswagen Passat fitment, this part number is listed for those exact vehicle ranges.

Common Issues This Part Can Address

• Rough idle caused by inaccurate airflow readings
• Hesitation or poor throttle response during acceleration
• Check engine light related to mass air flow sensor performance
• Incorrect fuel trim from faulty intake air measurement
• Reduced engine efficiency on affected Audi and Volkswagen models

Installation Notes and Tips

Verify the connector style, terminal count, and vehicle application before installation. This sensor uses a female connector and 5 terminals, and the housing is not included. Confirm the existing intake assembly matches the cataloged fitment for your Audi TT Quattro, Volkswagen Touareg, or other listed application before replacing the sensor.

Quality Assurance

Walker Products is an ISO 9001 and IATF 16949 certified manufacturer with long-standing experience in fuel system and engine sensor production. The company backs its parts with internal manufacturing, product management, engineering, and technical support resources to maintain application accuracy and specification control.