Walker 245-2078 Mass Air Flow Sensor

Walker Mass Air Flow Sensor 245-2078

Restore accurate air measurement and engine management with the Walker Mass Air Flow Sensor 245-2078. This Walker Mass Air Flow Sensor is built for direct replacement use on select Audi and Volkswagen applications, including Audi A4, Audi A4 Quattro, Audi A3, Volkswagen Cabrio, Passat, Golf, and Jetta models.

Key Features

• Mass air flow sensor for emission control and engine management systems
• Female connector with 4 terminals
• Mounting hardware included
• No housing included
• Walker part number 245-2078 for application matching

Walker Mass Air Flow Sensor Line

The Walker Mass Air Flow Sensor line is part of Walker Products’ engine sensor offering, backed by decades of fuel system and aftermarket experience. Walker manufactures components to meet or exceed OEM standards and specifications, with engineering and technical support focused on accurate part data and vehicle application coverage.

Detailed Description

Walker 245-2078 is a replacement mass air flow sensor for vehicles that rely on precise incoming air measurement for fuel delivery and drivability. It is listed for 1997-2000 Audi A4 Quattro, 1997-1999 Audi A4, 1998 Audi A3, 1995-1999 Volkswagen Cabrio, 1998-1999 Volkswagen Passat, 1995-1996 Volkswagen Passat, 1993-1998 Volkswagen Golf, and 1993-1998 Volkswagen Jetta. This part cross-references 19703M and MF21029 for the same application.

Common Issues This Part Can Address

• Rough idle caused by inaccurate airflow readings
• Hesitation or poor throttle response during acceleration
• Lean or rich fuel mixture concerns tied to sensor signal errors
• Check engine light related to mass air flow sensor performance
• Reduced fuel economy from incorrect air metering

Installation Notes and Tips

Verify connector style, terminal count, and mounting location before installation. This sensor uses a female connector with 4 terminals and includes mounting hardware, while the housing is not included. Confirm the vehicle application by year, make, and model before replacing the original sensor. For best results, inspect the intake tract for leaks, contamination, or damaged wiring that could affect sensor readings.

Quality Assurance

Walker Products is an ISO 9001 and IATF 16949 certified manufacturer with in-house manufacturing, product management, and engineering support. The company states its engine sensors and fuel system components are produced to meet or exceed OEM standards and specifications.