Genuine OEM Volkswagen Spark Plug, part number 101905617. This critical component is responsible for igniting the air-fuel mixture within the engine's combustion chambers, initiating the power stroke. It is installed directly into the cylinder head of the engine. Weighing 0.049 kg, this spark plug is engineered for precise timing and consistent spark delivery. Choosing a genuine OEM spark plug ensures correct heat range, electrode gap, and material composition for optimal engine efficiency and longevity.