Audi A8 High-Voltage Ignition Coil 0221604800 High-Performance Upgrade

For Audi A8 inline-four engines, high-voltage ignition coils (OEM: 0221604800) are required above each cylinder to boost low voltage to ignite the mixture. Applicable to A8 and other four-cylinder models, installation difficulty is moderate; estimated 1-1.5 hours; remove coil boot cover and connectors. If the vehicle experiences idle shake, weak acceleration, higher fuel consumption, or warning lights, the cause is usually coil aging or breakdown; replacement prevents misfire and power loss.