Ignition Coil & Iridium Spark Plugs for BMW 428i xDrive (2014-2016) 2.0L

Direct-Fit Ignition Coil & Iridium Spark Plugs for 2014-2016 BMW 4 Series (N20 / F32)

Restores lost power, resolves misfire codes, and ensures complete combustion for the N20-powered BMW 4 Series. This comprehensive ignition service kit includes four high-output ignition coils and four iridium laser performance spark plugs designed as a direct replacement for failing factory components.

The Stock 4 Series Ignition Weakness

The factory N20 engine is notorious for accelerating ignition component wear, especially under higher boost pressures or aggressive driving cycles. Over time, the OEM ignition coil packs succumb to heat soak generated by the turbocharged 2.0L block, degrading the internal winding insulation. This thermal stress leads to voltage leaks, weak spark generation, and sudden cylinder misfires (often throwing P0300 or specific cylinder codes). Concurrently, standard spark plug electrodes erode, increasing the spark gap, which demands higher coil voltage to jump, further compounding coil stress. The result is noticeable hesitation under load, poor fuel economy, and erratic idling.

The Engineering Solution

This upgraded ignition kit interrupts the cycle of thermal degradation. The included ignition coils feature reinforced housings and high-grade copper windings coated with thermal-resistant epoxy, significantly improving heat dissipation and stabilizing spark energy output. Paired with laser-welded iridium spark plugs, the system requires less firing voltage while delivering a hotter, more consistent spark. Iridium’s exceptionally high melting point prevents electrode erosion, maintaining a precise gap over tens of thousands of miles. This synergy guarantees a more complete fuel burn, eliminating high-RPM blow-out and restoring factory-rated horsepower and torque figures while stabilizing the idle.

Technical Specifications

Compatibility

• 2014-2016 BMW 428i xDrive 2.0L Base Coupe
• 2014-2016 BMW 428i xDrive 2.0L Base Convertible
• 2014-2016 BMW 428i xDrive 2.0L Gran Coupe

The BMW Precision Standard

Engineered to meet stringent European tolerance requirements, this ignition upgrade ensures precise timing, eliminates persistent CELs, and restores the smooth, linear power delivery expected from an N20 powertrain.