Genuine OEM Volkswagen Spark Plug, part number 03H905600A. This critical engine component is responsible for igniting the air-fuel mixture within the combustion chamber. It sits directly in the cylinder head, threaded into place. Weighing approximately 0.047 kg and measuring 86mm in length, this spark plug is manufactured to precise factory specifications. Using genuine OEM spark plugs ensures correct heat range, electrode gap, and material composition for optimal engine performance and longevity.