Compatibility: for Audi A8 Quattro 2013-2018 for Audi S6 2013-2018 for Audi S7 2013-2018 for Audi RS7 2014 for Audi S8 2013-2016 OE Number:079905110HFunctionality: Material: Plastic,Metal Package Content: 1 Pcs Ignition Coil Advantage: The ignition coil is responsible for converting the low voltage from the battery into a voltage needed to create a spark in the spark plugs. This spark ignites the air-fuel mixture in the engine cylinders, enabling combustion and powering the vehicle. Ignition coils are typically made of materials of metal, plastic, and rubber, durable and anti-deform. Efficient voltage transformation, good performance, durable construction, optimized for spark production. Installation Steps: Installation - Ignition coil installation steps: 1. Disconnect battery; 2. Locate old coil, remove electrical connections and mounting bolts; 3. Replace with a new coil, reconnect electrical connections; 4. Tighten the mounting bolts, and reconnect the battery; 5. Follow guidelines for accurate installation. Professional installation is highly recommended. Kindly Know: This is Non-OEM product, accessory Only! Please make sure your vehicle information before placing an order!