Spark Plug for the petrol engine ignition system, fitted to the 2.5L four-cylinder and 3.5L/3.9L V8 petrol engines.

It screws into the cylinder head and delivers the ignition spark that ignites the compressed air and fuel mixture in the combustion chamber. Spark plugs are a routine service item and should be renewed as a full set at the specified interval to maintain smooth running and efficient combustion.