VW Ignition coil

An Ignition coil is an induction coil in an automobile  ignition system which transforms the battery's 12V to approximately 20-30 thousand or more volts needed to ignite the spark plugs. Some coils have an internal resister to reduce the voltage and some rely on an external resister or resister wire to reduce the voltage from the cars 12v  wiring flowing into the coil. As you can see  The ignition coil is a vital component to your cars engine, replacing it will keep it running smooth and improve your gas mileage.