Ignition Coil and Iridium Spark Plugs for Audi A4 (2021-2023) 2.0L

High-Performance Ignition Coil and Iridium Spark Plug Kit for 2021-2023 Audi A4

Restores Peak Combustion Performance: Direct-replacement ignition service kit engineered to eliminate misfires, unstable idle, and boost-induced spark blow-out on direct-injected turbocharged engines.

The Stock A4 Thermal Fatigue and Spark Degradation

The forced-induction EA888 2.0L platform generates high combustion chamber pressures and elevated engine bay temperatures that rapidly deteriorate factory ignition components. Over continuous thermal cycles, OEM coil-on-plug assemblies suffer internal copper winding resistance breakdown and dielectric epoxy failure. Paired with worn factory plug gap erosion, this voltage leakage leads to acceleration hesitation, rough idle, catalytic converter-fouling unburnt fuel, and ECU misfire codes (P0300–P0304) under boost.

The Engineering Solution

This matched service kit features high-dielectric coil assemblies paired with fine-wire iridium spark plugs. The replacement coils utilize upgraded internal copper windings and heavy-duty silicone boots to resist thermal breakdown and arc flashover. The companion laser-welded iridium spark plugs require lower firing voltages while delivering superior resistance to spark erosion and fouling, ensuring rapid flame kernel expansion and stable combustion across the entire RPM band.

Technical Specifications

Compatibility

• 2021-2023 Audi A4 40 TFSI (2.0L Turbo I4)
• 2021-2023 Audi A4 45 TFSI quattro (2.0L Turbo I4)
• 2021-2023 Audi A4 allroad 45 TFSI quattro (2.0L Turbo I4)

The Audi Precision Standard

Engineered strictly to match German direct-injection engine management parameters, maintaining exact primary/secondary resistance specifications to eliminate Check Engine lights and ensure seamless factory ECU communication.