Genuine OEM Audi Longlife Spark Plug, part number 03F905600A. This critical engine component is responsible for igniting the air-fuel mixture within the combustion chamber, ensuring efficient power generation and smooth engine operation. Located in the cylinder head, it features advanced materials for extended service intervals. Using genuine OEM spark plugs guarantees precise heat range, correct electrode gap, and optimal performance, contributing to fuel efficiency and engine longevity.