The BMW X3 brake component utilizes P21W, H21W, and 921 bulb sizes for various lighting applications. Available data for the specified vehicle covers the period from 2004 through 2020.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
Brake
If US Type and EU Type show the same value, a direct cross-reference for this bulb is not available or the data is insufficient.