Walker 245-1294 Mass Air Flow Sensor

Walker 245-1294 Mass Air Flow Sensor

Walker 245-1294 is a complete mass air flow sensor and housing assembly for select BMW emission control applications. It is built with a black plastic housing, a male oblong connector, and blade terminals for a direct replacement-style installation on listed vehicles.

Compatible With 2003-2010 BMW M5, M6, 325Ci, 330Ci, X3, X5, 325i, 330i, 525i, and 530i applications, this Walker Complete Assembly is designed for emission control air pump service where the housing and sensor are replaced together.

Key Features

• Complete mass air flow sensor and housing assembly
• Black plastic housing with 1 connector
• Male connector with 3 blade terminals
• 100% new, never remanufactured construction
• Programmed and tested for fit, form, and function before release
• Custom-tuned flow characteristics for the full flow spectrum
• Built to meet or exceed OE long-term fuel trim targets

Product Details

Walker Products’ Complete Assembly line is aimed at replacement jobs where the sensor and housing are serviced together. For applications such as the BMW M5, BMW M6, and BMW X5, replacing the full assembly can help ensure the connector air tubes are clean and reduce the chance of contamination affecting the sensor. Part number 245-1294 is manufactured with OEM-quality components and verified through production testing and on-vehicle validation.

Walker 245-1294 is also cross-referenced to Standard Ignition MAS0285 for the same application.

What It Helps Fix

• Mass air flow sensor fault codes
• Rough idle caused by inaccurate airflow readings
• Lean or rich fuel trim conditions
• Driveability issues tied to contaminated or failing MAF hardware
• Emission control air pump-related airflow measurement problems

Installation Notes

Confirm the connector shape, terminal count, and housing style before installation. This part uses a male, 3-terminal blade connector with an oblong connector shape and includes the housing. Clean the intake tract and connector area before fitting the new assembly, and avoid touching the sensing element with bare hands.

For BMW 325Ci, 330Ci, 325i, 330i, 525i, 530i, X3, X5, M5, and M6 applications, verify the exact year and emission-control configuration against the vehicle listing before ordering.

Quality Assurance

Walker Products has supplied fuel system components since 1946 and is an ISO 9001 and IATF 16949 certified manufacturer. The 245-1294 MAF sensor is 100% programmed and tested before sale, with calibration verified through production and vehicle testing. Many Walker MAF sensors are manufactured in the USA using custom engineered circuit boards and OEM-quality components.