The BMW 330i brake light utilizes H21W and P21W bulb sizes according to the provided technical specifications for the vehicle lighting system. Available information covers the period from 2001 through 2018 for the specified automotive components.
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.