Walker 245-1203 Mass Air Flow Sensor

Walker Mass Air Flow Assembly 245-1203

Walker Mass Air Flow Assembly 245-1203 is a direct-fit mass air flow sensor assembly for select Audi applications. It is built with a housing included and a 3-terminal female connector layout for a straightforward replacement on the listed vehicles.

Key Features

• Mass air flow sensor assembly for emission control and engine management applications
• Housing included for a complete sensor assembly replacement
• 3-terminal female connector configuration
• Built by Walker, a long-standing manufacturer of fuel system and engine sensor components
• Cross-references Hitachi Automotive MAF0020 and Spectra Premium MA129 for the same application

Product Details

The Walker Mass Air Flow Assembly line focuses on engine sensor replacement parts that meet OEM-level specifications for fit and function. Part number 245-1203 is intended for Audi A4, A4 Quattro, A6, A6 Quattro, Cabriolet, 90, 90 Quattro, 100, and 100 Quattro applications listed below. This part number is also referenced as 245-1203 in catalog and search results, making it easier to match the correct sensor for Audi mass air flow sensor replacement needs.

Walker Products has supplied fuel system and engine management components since 1946 and maintains ISO 9001/IATF16949 certification. That manufacturing background supports consistent part identification, application coverage, and technical documentation for service work on Audi A6 Quattro and Audi A4 Quattro platforms, as well as related Audi 90 and 100 series vehicles.

What It Helps Address

• Rough idle caused by inaccurate airflow measurement
• Check engine light related to mass air flow sensor performance
• Poor throttle response during acceleration
• Fuel trim issues from incorrect air metering
• Driveability concerns on Audi A4, A6, and Cabriolet models

Installation Notes and Tips

Verify connector style, terminal count, and housing configuration before installation. This assembly uses a female connector and does not include mounting hardware. Confirm the vehicle application by year, model, and any VIN-based notes listed for 1993 Audi 90 and 100 Quattro coverage before replacing the sensor.

• Fits 1995-1998 Audi A6 Quattro, N/A
• Fits 1994-1998 Audi Cabriolet, N/A
• Fits 1996-1997 Audi A4, N/A
• Fits 1996-1997 Audi A4 Quattro, N/A
• Fits 1995-1997 Audi A6, N/A
• Fits 1994-1995 Audi 90, N/A
• Fits 1993-1995 Audi 90 Quattro, N/A
• Fits 1993-1994 Audi 100, N/A
• Fits 1994 Audi 100 Quattro, N/A
• Fits 1993 Audi 100 Quattro, N/A; Chassis/VIN number 4AP022307.
• Fits 1993 Audi 90, N/A; Compatible Mass Air Flow Sensor from Chassis/VIN 8CP191968.

Quality Assurance

Walker manufactures engine management components to meet or exceed OEM standards and specifications. The company’s in-house manufacturing, engineering, and product management support accurate application data and technical documentation for replacement parts such as this mass air flow sensor assembly.