A battery in a traditional car cannot directly create engine spark. It’s only rated at 12 volts, after all, so it needs a little help boosting the signal to the spark plugs. To make that happen, a car ...

An ignition coil takes voltage from the battery and multiplies it to create a spark at the spark plugs, which in turn ignites the engine. Cars have been using some form of the coil ignition system for ...

Volkswagen and Audi dealers in the United States now have enough ignition coils in stock to replace all coils on a vehicle, even if only one has failed. Coils provide electricity to the engine's spark ...