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

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

What it Does: Replaces degrading factory ignition coils and worn spark plugs to restore proper voltage output, eliminate misfires, and ensure complete fuel burn under high-boost conditions.

The Stock 4 Series Ignition Shortcoming

The factory ignition system on the BMW N20 2.0L turbocharged engine is notoriously susceptible to thermal degradation and voltage leaks. Over time, the constant heat cycling within the tight F32 engine bay degrades the epoxy housing of the OEM coils, leading to internal arcing. This resistance drops voltage output to the spark plugs, resulting in weak spark energy, partial combustion, and prominent cylinder misfires under heavy load or high boost. Standard factory spark plug gaps also widen as the electrodes erode, exacerbating rough idling, delayed throttle response, and poor fuel efficiency.

The Engineering Solution

This direct replacement ignition kit couples high-output coils with laser-welded iridium spark plugs to permanently resolve N20 spark blowout. The ignition coils are constructed with high-dielectric epoxy and reinforced silicone boots to withstand severe heat soak and prevent voltage leakage. By delivering a stronger, more consistent electrical arc, these coils ensure optimal combustion event timing. Paired with the ultra-fine center electrodes of the iridium spark plugs, the system requires less firing voltage while providing a concentrated spark front. This translates to restored factory horsepower, stabilized torque delivery across the RPM band, and a cleaner fuel burn without the risk of high-boost misfires.

Technical Specifications

Compatibility

• 2014-2016 BMW 428i 2.0L
• 2014-2016 BMW 428i xDrive 2.0L

The BMW Precision Standard

Designed to meet exact OEM tolerances for European platforms, this ignition overhaul ensures precise DME synchronization, eliminating check engine lights (CEL) and restoring the smooth, linear power delivery expected from your N20 powerplant.