An ignition coil, also called a spark coil, is an induction coil in an automobile's ignition system that transforms the battery's low voltage to the thousands of volts needed to create an electric spark in the spark plugs to ignite the fuel A modern passenger automobile may use one ignition coil for each engine cylinder (or pair of cylinders), eliminating fault-prone spark plug cables and a distributor to route the high voltage pulses. It consists of a laminated iron core surrounded by two coils of copper wire. Unlike a power transformer, an ignition coil has an open magnetic circuit — the iron core does not form a closed loop around the windings. The energy that is stored in the magnetic field of the core is the energy that is transferred to the spark plug. Aopec offers both open and closed magnetic types, ranges cover most vehicles of VW, HONDA, OPEL, BMW,AUDI, FIAT, TOYOTA,NISSAN, MAZDA, FORD,HYUNDAI, etc.