Walker 245-1255 Mass Air Flow Sensor

Walker Mass Air Flow Sensor 245-1255

Walker Mass Air Flow Sensor 245-1255 is a direct-fit engine management sensor for select Audi applications, including Audi R8 and Audi A8 Quattro models. It is built for vehicles that need accurate airflow signal input to support proper fuel delivery and drivability.

Key Features

• Mass air flow sensor for emission control and engine management systems
• Part number 245-1255 for easy catalog matching
• 5-terminal female connector
• Mounting hardware included
• Housing not included
• Walker Mass Air Flow Sensor line focused on OE-style fit and application accuracy

Product Details

Walker Products has supplied fuel system and engine sensor components since 1946, with manufacturing and engineering processes built around OEM-level specifications. The Walker Mass Air Flow Sensor line is intended for accurate airflow measurement, which helps the engine control module calculate fuel delivery and maintain consistent performance. Part number 245-1255 is listed for Audi R8 and Audi A8 Quattro applications, making it a practical replacement choice when the original sensor is no longer reading correctly.

This part cross-references Hitachi Automotive MAF0057 for the same application.

What It Helps Address

• Rough idle caused by incorrect airflow readings
• Hesitation or stumble during acceleration
• Poor fuel trim behavior from a failing sensor signal
• Check engine light concerns related to mass air flow performance
• Driveability issues on Audi R8 and Audi A8 Quattro applications

Installation Notes

Verify connector style, terminal count, and sensor-only configuration before installation. This unit uses a female 5-terminal connector and does not include the housing. Confirm the vehicle application against the listed fitment before replacing the sensor, and inspect the intake tract for contamination or air leaks that can affect sensor readings. Fits 2009 Audi R8, N/A; Fits 2010-2012 Audi R8, N/A; Fits 2014-2015 Audi R8, N/A; Fits 2017-2018 Audi R8, N/A; Fits 2020 Audi R8, N/A; Fits 2021-2023 Audi R8, N/A; Fits 2010 Audi A8 Quattro, N/A; Fits 2015-2016 Audi A8 Quattro, N/A.

Quality Assurance

Walker Products is an ISO 9001 and IATF 16949 certified manufacturer with long-standing experience in fuel system components and engine sensors. The brand states that its parts are produced to meet or exceed OEM standards and supported by internal manufacturing, engineering, and technical resources.