Coil On Plug (COP) Ignition Coil. FC 21. FC 22. Ignition Coil, Spark Plug, Ignition Cable.
An induction coil, placed on each sparkplug of a vehicle and used with and ECU and a Camshaft or Crankshaft position sensor for timing, to transform a vehicles battery voltage to a much higher voltage needed to create proper spark in the spark plug.

IGNITION COIL

Ignition Coil
A failed ignition coil in your 2009 Volvo XC60 can lead to anything from an intermittent misfire to a car that won't start.