Ignition Coil and Iridium Spark Plugs for Ford Flex (2013-2015) 3.5L

Direct-Replacement Ignition Coil and Iridium Spark Plug Kit for 2013-2015 Ford Flex

Complete Ignition Refresh: Direct OEM-fit ignition coil and fine-wire iridium spark plug service kit engineered to eliminate misfires, restore primary spark energy, and optimize combustion efficiency across all six cylinders.

The Stock Flex Thermal Degradation and Voltage Leakage

Factory coil packs on the transverse Duratec 35 V6 suffer significant thermal degradation due to under-hood heat soaking, especially across the rear bank against the firewall. Over heat cycles, factory epoxy insulations micro-crack, allowing internal secondary voltage leakage, dielectric breakdown, and intermittent hesitation under high-load acceleration. Concurrently, standard nickel or worn factory electrodes experience gap erosion, forcing aging coils to operate at elevated primary amperage and triggering unburned hydrocarbon build-up.

The Engineering Solution

This service pack upgrades the ignition loop with high-dielectric epoxy housing and precision-wound electrolytic copper secondaries for high spark energy output. Paired with ultra-fine wire iridium center-electrode spark plugs, the system requires lower strike voltage while maintaining a stable plasma kernel. The corrosion-resistant nickel-plated plug shells and high-durability boots resist ozone breakdown and secondary arching under continuous thermal cycling.

Technical Specifications

Compatibility

• 2013 Ford Flex 3.5L V6 (SE, SEL, Limited)
• 2014 Ford Flex 3.5L V6 (SE, SEL, Limited)
• 2015 Ford Flex 3.5L V6 (SE, SEL, Limited)

The Ford Utility Standard

Designed to sustain consistent ignition performance during severe-duty daily hauling and cross-country towing, delivering smooth idle stability, instant throttle response, and complete burn consistency across all operating ranges.