Ignition Coil and Iridium Spark Plugs for BMW M3 (2015-2018) 3.0L

Direct-Fit Ignition Coil and Iridium Spark Plug Kit for 2015-2018 BMW M3

Complete Ignition Refresh: Replaces degraded factory coil packs and worn spark plugs to eliminate high-boost misfires and restore precise combustion timing across all six cylinders.

The Stock M3 Ignition Breakdown Under Boost

The twin-turbocharged S55 engine generates elevated cylinder pressures and extreme underhood thermal loads. Over time, OEM coil pack epoxy insulation degrades, causing dielectric breakdown, micro-arcing, and spark blowout under peak boost. Concurrently, factory spark plug gaps erode, increasing electrical resistance, stressing the ignition drivers, and inducing rough idle or high-RPM hesitation.

The Engineering Solution

This direct-replacement ignition service kit features six heavy-duty coil-on-plug assemblies engineered with high-purity internal copper windings and thermal-resistant resin housings. Paired with six fine-wire iridium spark plugs, this kit provides a concentrated, high-energy spark kernel with superior thermal dissipation. The iridium center electrode resists electrical erosion under extreme cylinder pressures, ensuring stable combustion, crisp throttle response, and extended service intervals.

Technical Specifications

Compatibility

• 2015 BMW M3 Base Sedan 3.0L L6 Twin-Turbo (S55B30)
• 2016 BMW M3 Base Sedan 3.0L L6 Twin-Turbo (S55B30)
• 2017 BMW M3 Base / Competition Sedan 3.0L L6 Twin-Turbo (S55B30)
• 2018 BMW M3 Base / Competition / CS Sedan 3.0L L6 Twin-Turbo (S55B30)

The BMW Precision Standard

Engineered to exact OEM operational tolerances, this kit maintains clean DME communication without triggering false misfire codes or check engine lights, delivering reliable spark delivery under demanding street and track driving conditions.