Genuine OEM Audi Spark Plug, part number 101905611A. This essential 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. Weighing 0.047 kg, this spark plug features a specific electrode design and heat range. Selecting a genuine OEM spark plug guarantees the precise heat range and electrode gap required for optimal combustion, engine performance, and fuel efficiency.