Walker 245-2171 Mass Air Flow Sensor

Walker Mass Air Flow Sensor 245-2171

Restore accurate airflow measurement with the Walker Mass Air Flow Sensor 245-2171. This replacement sensor is built for select Audi and Volkswagen applications, including Audi A4, Audi A4 Quattro, Audi A3, Audi TT, Volkswagen GTI, Volkswagen Jetta, Volkswagen Passat, Volkswagen Eos, and Volkswagen Golf R.

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

Key Features

• Mass air flow sensor for engine management and airflow measurement
• Direct-fit application coverage for select Audi and Volkswagen models
• Built by Walker, a long-standing manufacturer of fuel system and sensor components
• Part number 245-2171 for accurate catalog matching
• Cross-references Delphi AF10144 and Spectra Premium MA324 for the same application

Detailed Description

The Walker Mass Air Flow Sensor 245-2171 helps the engine control system measure incoming air so fuel delivery can be managed correctly. Accurate airflow data is important for drivability, idle quality, throttle response, and emissions performance. This sensor is listed for 2005-2009 Audi A4 and Audi A4 Quattro, 2006-2008 Audi A3, 2008-2009 Audi TT, and multiple Volkswagen applications including 2006-2008 GTI, Jetta, and Passat, plus 2007-2009 Eos and 2012-2013 Golf R.

For buyers searching for a mass air flow sensor for Audi A4 Quattro 2005-2009, Volkswagen GTI 2006-2008, or Audi TT 2008-2009, part number 245-2171 provides a cataloged replacement option from Walker. It is also a fitment-based choice for Volkswagen Jetta and Passat models in the listed years.

What It Helps Address

• Rough or unstable idle caused by inaccurate airflow readings
• Hesitation or poor throttle response during acceleration
• Fuel trim issues related to incorrect air measurement
• Check engine light conditions tied to mass air flow sensor faults
• Reduced drivability from a contaminated or failing sensor

Installation Notes and Tips

Verify the part number and vehicle application before installation. Confirm the connector style, housing style, and engine configuration against the original sensor on the vehicle. After installation, clear diagnostic trouble codes and perform any relearn or adaptation steps required by the vehicle manufacturer.

Quality Assurance

Walker Products states that its engine sensors and fuel system components are manufactured to meet or exceed OEM standards and specifications. The company supports production with in-house manufacturing, product management, engineering, application data, instruction sheets, and technical support, and operates as an ISO 9001/IATF16949 certified manufacturer.