6 High Performance Ignition Coil for Ford Explorer (2013-2019) 3.5L Engine

Precision-Engineered Ignition Coils for 2013-2019 Ford Explorer 3.5L EcoBoost (U502)

Direct-fit high-output ignition coils designed to eliminate secondary voltage leaks and restore combustion efficiency in the Ford 3.5L EcoBoost twin-turbo V6 engine.

The Stock Explorer Ignition Weakness

The U502 chassis environment subjects the ignition system to significant thermal stress, particularly during extended idling or towing. The factory UF646 coils often suffer from dielectric breakdown within the internal epoxy resin due to cumulative heat cycles. This degradation leads to carbon tracking and micro-fissures in the coil housing, which manifests as intermittent misfires under load, decreased fuel economy, and hesitant throttle response. Furthermore, the OEM primary and secondary windings can develop internal resistance over time, resulting in a weakened spark energy that fails to provide a clean burn, especially as the gap on the spark plugs naturally widens.

The Engineering Solution

These performance-grade replacements are engineered using high-conductive German copper wire and premium silicone magnetic steel to optimize the turns ratio. This design facilitates a more efficient step-up transformation, delivering a higher voltage ceiling and longer spark duration than standard replacements. To combat the common failure points of the Cyclone engine family, the internal components are vacuum-potted with a high-temp thermal epoxy that eliminates air pockets, providing superior insulation against moisture and high-frequency engine vibration. The reinforced thermoplastic housing offers increased chemical resistance, ensuring the coils maintain structural integrity and voltage isolation throughout the 3.5L engine's entire RPM range.

Technical Specifications

Compatibility

• 2013 Ford Explorer 3.5L V6 EcoBoost Turbo (Sport)
• 2014 Ford Explorer 3.5L V6 EcoBoost Turbo (Sport)
• 2015 Ford Explorer 3.5L V6 EcoBoost Turbo (Sport)
• 2016 Ford Explorer 3.5L V6 EcoBoost Turbo (Sport, Platinum)
• 2017 Ford Explorer 3.5L V6 EcoBoost Turbo (Sport, Platinum)
• 2018 Ford Explorer 3.5L V6 EcoBoost Turbo (Sport, Platinum)
• 2019 Ford Explorer 3.5L V6 EcoBoost Turbo (Sport, Platinum)

The Ford Performance Quality

Reliable ignition performance is critical for maintaining the towing capacity and highway stability of the U502 Explorer. These coils ensure consistent cold starts and a linear power band, providing the durability required for heavy-duty utility and long-distance transit. By stabilizing the secondary voltage output, these units protect your catalytic converters from unburnt fuel and prevent the common P0300-P0306 misfire codes that plague aging Cyclone engines.

Common Questions

Will these UF646 ignition coils fit my 2013-2019 Ford Explorer 3.5L?
This 6-pack is built for 2013-2019 Ford Explorer 3.5L models equipped with factory UF646 (3-pin EcoBoost Turbo) ignition coils.

What is included in this ignition coil set?
The package includes 6 direct-fit performance ignition coils (part number UF646) to service all six cylinders on the 3.5L V6.

How are these coils constructed compared to stock replacements?
They are built with high-conductive German copper wire, silicone magnetic steel cores, vacuum-potted high-temp thermal epoxy, and reinforced thermoplastic housings.

Do these coils require any wiring modifications to install?
They are direct-fit replacements that bolt into the factory locations on the U502 3.5L engine and plug directly into the OEM wiring harness.

What engine symptoms can new UF646 coils help resolve?
Replacing heat-cycled coils restores secondary voltage output to help resolve P0300-P0306 misfire codes, rough cold starts, and hesitation under load.