Hyundai Genesis (DH): Ignition System / Spark Plug Description and Operation
A spark plug is a device for delivering electric current from
an ignition system to the combustion chamber of a spark-ignition engine
to ignite the compressed fuel/air mixture therein by means of an
electric spark, while containing combustion pressure within the engine. A
spark plug has a metal threaded shell, electrically isolated from a
central electrode by a porcelain insulator.

Removal
Ignition Coil #1
1.
Turn the ignition switch OFF and disconnect the battery negative (-) cable.
2.
Remove the engine wiring protector (A) after loosening the bolt.
Specification
ItemSpecificationTypeDILKR7A11Gap 1.0 ~ 1.1 mm (0.0394 ~ 0.0433 in.)