The BMW Alpina B7 front inner turn signal requires a 3357NA or 3457NA bulb size, front turn signal uses a 12961 bulb size, and rear turn signal uses a PY21W bulb size. The replacement chart covers 2007 to 2008 model years with corresponding bulb specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.