Genuine OEM Audi Spark Plug, part number 101905600A. This essential 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. Designed for optimal performance and durability, it features specific electrode materials and gap settings. Weighing approximately 0.057 kg, this spark plug ensures efficient combustion. Using a genuine OEM spark plug guarantees the correct heat range, electrode design, and material quality for consistent ignition, optimal engine performance, and fuel efficiency.