Part Number: This sensor is designed to replace parts 13627602038, MAS4581, MAS0338, and 0280218266, ensuring a and optimal performance. Compatibility: Perfectly compatible with for models including the 1, 2, 3, 4, 5, 6 Series, as well as M3, , X1, X3, X4, X5, and X6. Pin Configuration: Features a 4-pin setup for easy and secure installation. Enhanced Engine Performance: Helps in measuring the volume and density of air entering the engine, providing accurate data to optimize mixture and engine performance. and Reliable: Manufactured with high-quality materials to and reliability in monitoring air intake. Color: Black & Blue Material: plastic Package Contents: 1 x Air flow meter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.