Ignition Coil and Iridium Spark Plugs for Ford Focus (2012-2018) 2.0L

Direct-Fit Ignition Coil & Iridium Spark Plug Service Kit for 2012-2018 Ford Focus

Primary Function: Replaces degraded factory coil-on-plug packs and worn spark plugs to eliminate misfire codes, restore combustion efficiency, and stabilize idle in direct-injected 2.0L engines.

The Stock Focus Ignition Breakdown

The C346 Focus engine bay subjects the direct-injection ignition system to severe thermal cycling. Over time, OEM coil boots degrade from heat soak, developing microscopic fissures in the silicone insulation. This causes high-voltage dielectric breakdown and secondary arcing to the cylinder head wall, leading to P0300–P0304 DTC misfires under load. Simultaneously, standard factory spark plugs suffer from center-electrode erosion, widening the spark gap and straining internal primary and secondary coil windings.

The Engineering Solution

This comprehensive tune-up kit features four high-dielectric epoxy-molded ignition coils paired with laser-welded fine-wire iridium spark plugs. The coils utilize premium copper windings engineered to resist thermal degradation and prevent voltage drop under peak cylinder pressures. The matched iridium plugs provide an ultra-durable 0.6mm center electrode for consistent arc propagation, lowered ignition voltage demand, and complete fuel atomization in high-compression direct-injection chambers.

Technical Specifications

Compatibility

• 2012-2018 Ford Focus S (2.0L I4 Ti-VCT)
• 2012-2018 Ford Focus SE (2.0L I4 Ti-VCT)
• 2012-2018 Ford Focus SEL (2.0L I4 Ti-VCT)
• 2012-2018 Ford Focus Titanium (2.0L I4 Ti-VCT)

The Ford Reliability Standard

Engineered to exact OEM tolerances, these plug-and-play components restore crisp throttle response, protect the catalytic converter from unburnt fuel contamination, and guarantee complete ECU compatibility without triggering false CEL alerts.