Ignition Coil and Iridium Spark Plugs for Ford Explorer (2016-2019) 2.3L

Direct-Replacement Ignition Coil and Iridium Spark Plug Service Kit for 2016-2019 Ford Explorer

What it Does: Replaces degraded factory coil-on-plug units and worn spark plugs to eliminate misfires, stabilize idle, and restore peak combustion efficiency in turbocharged four-cylinder applications.

The Stock Explorer Ignition Breakdown

Under sustained boost and severe thermal cycling inside the transverse engine bay, factory ignition coils suffer internal dielectric insulation breakdown and secondary copper winding fatigue. Combined with high cylinder pressures on the direct-injected EcoBoost platform, worn electrodes cause spark blow-out, carbon tracking across the plug insulator, and hesitation under load, frequently triggering cylinder misfire diagnostic trouble codes (DTC P0300-P0304).

The Engineering Solution

This matched service kit features four heavy-duty coil-on-plug assemblies built with high-grade internal copper windings and thermal-shock resistant epoxy potting to prevent voltage leakages. Paired with laser-welded fine-wire iridium spark plugs, the assembly delivers a focused spark kernel capable of piercing dense air-fuel mixtures under boost, resisting gap erosion, and lowering secondary voltage demand for dependable throttle response.

Technical Specifications

Compatibility

• 2016-2019 Ford Explorer: Base, XLT, Limited (2.3L EcoBoost Turbocharged I4)
• Interchange / OE Part Numbers: UF670, DG546, 5C1873, CM5Z-12029-A, CM5E-12A366-BC, CM5E12A366CA, JDE30294, 6736203

The Ford Durability Standard

Engineered to handle the continuous thermal demands of family hauling, daily commuting, and utility towing, this ignition package delivers precise discharge timing and consistent arc stability without triggering CEL faults.