Ignition Coil and Iridium Spark Plugs for BMW M4 (2015-2020) 3.0L

Direct-Fit Ignition Coil and Iridium Spark Plug Kit for 2015-2020 BMW M4

What it Does: Restores factory ignition energy and eliminates high-boost misfires by replacing degraded coil packs and worn plugs with matched high-dielectric assemblies and fine-wire iridium plugs.

The Stock S55 Ignition Breakdown

The twin-turbocharged S55 engine operates under extreme cylinder pressures and high thermal loads within the tight engine bay. Over time, OEM coil packs succumb to thermal cycling and insulation breakdown, resulting in internal dielectric breakdown, micro-arcing, and carbon tracking. As the factory spark plug gap erodes, increased resistance strains the coil windings, leading to hesitations, rough idle, and spark blowout under peak boost conditions.

The Engineering Solution

This complete 6-cylinder ignition service kit features coil-on-plug units engineered with high-purity copper primary and secondary windings encased in reinforced, heat-resistant thermoplastic housings. The paired iridium spark plugs feature laser-welded fine-wire center electrodes that require lower firing voltage while maintaining exceptional thermal conductivity and resistance to spark erosion. Direct-fit blade terminals and factory-keyed connectors ensure plug-and-play installation without harness modification.

Technical Specifications

Compatibility

• 2015-2020 BMW M4 Base (Coupe / Convertible) 3.0L S55 Twin-Turbo
• 2016-2020 BMW M4 Competition Package 3.0L S55 Twin-Turbo
• 2016 BMW M4 GTS 3.0L S55 Twin-Turbo
• 2019-2020 BMW M4 CS 3.0L S55 Twin-Turbo

The BMW Precision Standard

Engineered to meet stringent European OBD-II parameters, this ignition kit maintains proper ionization signaling to the DME, ensuring precise knock detection, instant throttle response, and zero check engine lights under demanding driving conditions.