Ignition Coil Spark Plugs for Ford Bronco (2021-2023) 2.3L

Direct-Replacement Ignition Coil & Iridium Spark Plug Kit for 2021-2023 Ford Bronco (U725)

What it Does: The direct-replacement ignition kit restores clean combustion and eliminates misfires on the 2021-2023 Ford Bronco by delivering a high-output spark across all cylinders.

The Stock Ford Bronco Ignition Breakdown

The turbocharged 2.3L EcoBoost platform in the sixth-generation U725 Bronco operates under high cylinder pressures and intense thermal loads. Over extended duty cycles, factory coil-on-plug boots degrade from engine bay heat soak, resulting in micro-arcing and secondary voltage breakdown. Concurrently, high-boost forced induction accelerates electrode wear on standard plugs, causing premature gap widening. This degradation triggers intermittent misfire codes (P0300-P0304), rough idle cycles, tip-in hesitation under boost, and unburnt fuel washing down exhaust components.

The Engineering Solution

This service kit resolves secondary ignition collapse by pairing four heavy-duty coil packs with fine-wire iridium spark plugs. The coils utilize vacuum-impregnated epoxy potting around primary and secondary copper windings, sealing internal electronics against thermal degradation and vibration-induced open circuits. High-dielectric silicone boots resist carbon tracking into deep cylinder head spark plug wells. The included iridium spark plugs feature a minimal center electrode cross-section, requiring significantly lower ionization voltage to jump the gap under peak boost while preventing premature electrode erosion. This comprehensive drop-in package directly interchanges with UF855 hardware to guarantee factory ECU dwell-time compatibility.

What's Included

• 4 Black Ignition Coils (Coil-on-Plug)
• 4 Iridium Fine-Wire Spark Plugs

Technical Specifications

Compatibility

• 2021-2023 Ford Bronco 2.3L I4 (Base, Big Bend, Black Diamond, Outer Banks, Badlands)
• Compatible with both 7-speed manual and 10-speed automatic transmissions

Frequently Asked Questions & Fitment Warnings

Does this fit the U725 Bronco?

Yes, this is a direct fit for the 2021-2023 Ford Bronco equipped with the 2.3L EcoBoost inline-4 engine; it does not fit the 2.7L or 3.0L Nano V6 configurations.

Should dielectric grease be used during installation?

Applying a thin film of dielectric grease inside the lower silicone boot is highly recommended to seal out moisture and prevent boot adhesion to the spark plug ceramic.

The Ford Trailhead Standard

Engineered to withstand rigorous off-camber trail abuse, severe towing loads, and continuous high-boost demands, this ignition package delivers the uncompromised combustion reliability your off-road rig requires.