Factory BMW ignition coils. BMW ignition coils have been plauged with premature failure. BMW uses BREMI/STI/Bosch coils as factory parts. These are made by BREMI/STI. When replacing the coils it is a very good idea to replace the insulator boots as well. One coil per cylinder. Sold each. If your model was built after 08/2002 your coils are here> Later design coils.Ordering Tips