The BMW 128i brake light utilizes P21W and H21W bulb sizes according to the provided technical specifications for the lighting system. Data for the lighting components covers the range from 2008 to 2013.
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.