Ignition Coil and Iridium Spark Plugs for Audi A4 (2005-2016) 2.0L

Direct-Replacement Ignition Coil and Iridium Spark Plug Kit for 2005-2016 Audi A4

Direct-fit complete ignition refresh kit: Restores factory secondary ignition output and stable combustion across all four cylinders to eliminate high-load misfires and rough idling.

The Stock A4 Thermal Fatigue and Spark Blowout Weakness

Factory ignition coils on turbocharged 2.0L Audi engines operate in high-temperature cylinder-head pockets, making them prone to severe thermal cycling. Over time, internal coil epoxy cracks and primary windings degrade, causing internal dielectric breakdown and spark dissipation under boost. Concurrently, standard spark plug electrodes erode, widening the gap and demanding higher secondary voltage that degraded factory coils cannot supply, resulting in rough idle, hesitation, and persistent P0300-P0304 diagnostic trouble codes.

The Engineering Solution

This balanced ignition service kit pairs four upgraded coil-on-plug units with four high-efficiency iridium spark plugs. The replacement coils feature high-conductivity internal copper windings and reinforced dielectric silicone boots to eliminate high-voltage arcing. The matched iridium plugs feature ultra-fine center electrodes with exceptional melting points, maintaining precise gap tolerances under sustained thermal loads and requiring lower strike voltage for instant, complete flame kernel propagation.

Technical Specifications

Compatibility

• 2005-2008 Audi A4 (B7): 2.0T FSI (Base, Avant, Cabriolet, Quattro)
• 2009-2016 Audi A4 (B8 / B8.5): 2.0T TFSI (Premium, Premium Plus, Prestige, Avant, Quattro)

The Audi Precision Standard

Calibrated specifically for European engine management requirements, this ignition kit maintains precise primary/secondary resistance parameters to ensure clean ECU communication, zero check-engine light triggers, and factory-smooth idle quality.