Genuine OEM Audi Spark Plug, part number 06H905601C. This component is responsible for igniting the compressed air-fuel mixture within the engine's combustion chambers, initiating the power stroke. It is installed in the cylinder head. Weighing 0.046 kg and measuring 0.075 m in length. Choosing a genuine OEM spark plug ensures the correct heat range, electrode gap, and material composition for optimal combustion, fuel efficiency, and engine longevity.