Ignition Coil and Iridium Spark Plugs for Ford Fiesta (2014-2017) 1.0L

Direct-Fit Ignition Coil and Iridium Spark Plug Kit for 2014-2017 Ford Fiesta

What it Does: The Ignition Coil and Iridium Spark Plug Kit replaces degraded ignition components on the 2014-2017 Fiesta to restore factory combustion efficiency, eliminate high-RPM spark blowout, and smooth out idle stability.

The Stock Ford Fiesta Ignition Breakdown

The compact cylinder head of the 1.0L EcoBoost Fox inline-three engine subjects ignition coils to elevated thermal soak and severe vibrational harmonics inside the B299 chassis engine bay. Over continuous heat cycles, the factory pencil coils suffer from internal dielectric breakdown and compromised epoxy insulation, leading to secondary winding arcing and intermittent cylinder misfires (DTC P0300–P0303). Compounded by factory spark plugs experiencing rapid ground electrode erosion under forced-induction cylinder pressures, the widened plug gaps place excessive electrical strain on the coil pack drivers inside the powertrain control module (PCM).

The Engineering Solution

This comprehensive refresh kit provides direct coil-on-plug replacements paired with laser-welded iridium spark plugs designed specifically for turbocharged applications. The coils feature high-conductivity copper primary and secondary windings encased in high-dielectric epoxy potting to withstand heavy thermal loading without micro-arcing. Matching OEM dwell and discharge profiles, this assembly directly supersedes factory references CM5Z12029C, CM5Z12029B, and UF736. The paired fine-wire iridium spark plugs feature a minimal surface area center electrode to significantly decrease firing voltage requirements, providing a concentrated, stable flame kernel that prevents quenching under peak boost.

Technical Specifications

Compatibility

• 2014 Ford Fiesta SE 1.0L L3 Turbo EcoBoost
• 2015 Ford Fiesta SE 1.0L L3 Turbo EcoBoost
• 2016 Ford Fiesta SE 1.0L L3 Turbo EcoBoost
• 2017 Ford Fiesta SE 1.0L L3 Turbo EcoBoost

Frequently Asked Questions

Does this fit the B299 Fiesta?
Yes, this is a direct fit for the 2014-2017 Ford Fiesta equipped with the 1.0L EcoBoost Fox engine.

Are these spark plugs pre-gapped for turbocharged EcoBoost engines?
Yes, they come pre-gapped to factory forced-induction specifications, though checking gap clearance prior to torque-down is recommended workshop practice.

The Ford Compact Engineering Standard

Engineered to meet the exact diagnostic parameters and electrical tolerances of Ford's European-designed EcoBoost powertrain, this direct replacement kit ensures zero check engine lights, immediate throttle response, and smooth idle delivery across daily commuting and spirited driving.