These NGK Ignition Coils, also known as engine coils or spark plug coils, deliver the highest in durability and operational performance. Manufactured to OE standards, NGK Spark Plug Coils take power from the alternator and relay that power to the spark plugs. This ignites the fuel and makes your vehicle run. While ignition coils are built to last, over time, your current ignition coil may have begun to fail. With this in mind, if your vehicle exhibits bad ignition coil symptoms including backfiring, misfiring, stalling, or not starting in cold weather, consider NGK, the ignition ...