Genuine OEM Audi Ignition Coil, part number 06A905115D. This component is essential for the engine's ignition system, converting low voltage from the battery into the high voltage needed to create a spark at the spark plugs. Proper function of the ignition coil is vital for consistent engine performance, fuel combustion, and emissions control. Genuine OEM coils are designed for precise electrical characteristics and durability, ensuring long-term reliability.