Ignition Coil and Iridium Spark Plugs for BMW M5 (2018-2020) 4.4L

Direct-Fit High-Performance Ignition Service Kit for 2018-2020 BMW M5

Direct-replacement ignition overhaul kit: Restores factory spark energy and cylinder combustion efficiency across all eight cylinders on twin-turbocharged 4.4L V8 powerplants.

The Stock M5 Ignition Coil Thermal Breakdown

Due to the hot-vee architecture of the S63 engine, the turbochargers sit directly inside the cylinder banks, concentrating extreme thermal radiation over the valve covers. This persistent thermal cycling degrades the OEM epoxy resin potting and secondary copper windings within the factory coil boots. Over time, internal insulation breaks down, causing high-voltage dielectric leakage, spark blowout at elevated boost levels, rough idle, and DME-triggered cylinder misfire fault codes.

The Engineering Solution

This complete ignition kit matches eight heavy-duty coil-on-plug units with eight fine-wire iridium spark plugs. The ignition coils feature high-conductivity internal copper windings encased in reinforced, heat-resistant potting compound to resist thermal saturation and voltage degradation. Matched iridium center electrodes maintain a sharp spark profile with lower required firing voltages, delivering rapid flame kernel propagation, stable combustion under high cylinder pressures, and zero diagnostic trouble codes.

Technical Specifications

Compatibility

• 2018 BMW M5 Base Sedan 4.4L V8 S63
• 2019 BMW M5 Base & Competition Sedan 4.4L V8 S63
• 2020 BMW M5 Base & Competition Sedan 4.4L V8 S63

The BMW Precision Benchmark

Engineered to satisfy precise European DME diagnostic tolerances, this kit ensures seamless communication with the factory engine management system, preventing phantom misfire counters and delivering instantaneous throttle response without check engine lights.