The product is a set of 6 OEM Bosch ignition coils and boots designed for various BMW models including E39, E46, X5, E60, X3, Z3M, and Z4. Made in Germany, these ignition coils come with a 1-month manufacturer warranty and do not require an external resistor. The parts are guaranteed to provide reliable ignition performance for your vehicle. With specific OE/OEM part numbers and compatibility with specific BMW models, this set of ignition coils is a high-quality replacement for your car's ignition system.