Ignition Coil and Iridium Spark Plugs for Audi S4 (2000-2002) 2.7L

Direct-Fit Ignition Coil and Iridium Spark Plug Kit for 2000-2002 Audi S4

What it Does: The ignition coil and iridium spark plug kit replaces fatigued factory ignition components on the 2000-2002 Audi S4 to restore consistent spark energy, eliminate high-RPM spark blowout, and stabilize cylinder combustion under boost.

The Stock Audi S4 Secondary Ignition Weakness

The twin-turbocharged 2.7L engine bay in the B5 chassis traps extreme radiant heat around the cylinder heads. Over time, thermal cycling degrades the factory coil pack silicone boots and breaks down internal primary and secondary copper windings. Micro-fractures in the coil epoxy lead to dielectric breakdown, bleeding voltage to the cylinder head rather than the plug gap. Combined with widened gaps on worn factory plugs, this high resistance overburdens the ignition system, resulting in severe high-load misfires, erratic idle, and protective ECU torque intervention.

The Engineering Solution

This comprehensive ignition service kit addresses high cylinder pressure demands with heavy-duty construction. The six pencil ignition coils feature high-grade magnetic steel cores paired with reinforced epoxy potting to resist thermal degradation and internal short-circuiting. The matching iridium spark plugs feature a fine-wire 0.6mm iridium-alloy center electrode and laser-welded ground electrode. This design dramatically lowers the required ignition firing voltage, maintains quenching resistance against boosted air-fuel charges, and prevents carbon fouling under demanding operational cycles.

Technical Specifications

Compatibility

• 2000 Audi S4 Base Sedan 2.7L V6 Gas DOHC Turbocharged (APB)
• 2001 Audi S4 Base Sedan 2.7L V6 Gas DOHC Turbocharged (APB)
• 2001 Audi S4 Avant Wagon 2.7L V6 Gas DOHC Turbocharged (APB)
• 2002 Audi S4 Base Sedan 2.7L V6 Gas DOHC Turbocharged (APB)
• 2002 Audi S4 Avant Wagon 2.7L V6 Gas DOHC Turbocharged (APB)

Frequently Asked Questions

Does this fit the B5 S4?
Yes, this is a direct fit for the 2000-2002 Audi S4 equipped with the APB 2.7L twin-turbocharged V6 engine.

Do these iridium spark plugs require gapping prior to installation?
While pre-gapped for factory spec, plug gaps should always be verified with a feeler gauge to match your specific boost and calibration levels.

The Audi Precision Standard

Engineered to meet rigorous German factory tolerances, this direct-fit ignition system restores smooth idle dynamics, protects catalytic converters, and ensures complete, reliable combustion cycles without triggering check engine lights or misfire fault codes.