The car ignition coil is a vital component in the engine's ignition system. It converts the low voltage of the car's battery into a high voltage necessary to create an electrical spark in the spark plugs. The ignition coil typically consists of a primary coil, secondary coil, core, and terminals. It uses an interrupter switch to control the ignition timing and ensure that the spark occurs at the right moment to ignite the fuel mixture in the engine. The ignition coil is manufactured with high-quality materials and subjected to rigorous testing to ensure its reliability and durability. It is an essential part of the engine, contributing to optimal engine performance and fuel efficiency. This ignition coils apply to the BWM series.