Ignition Coil and Iridium Spark Plugs for Ford F-150 (2011-2015) 3.5L

Direct-Fit Ignition Coil and Iridium Spark Plug Service Kit for 2011-2015 Ford F-150 3.5L

Complete Ignition Refresh: Replaces degraded factory ignition coils and worn plugs to eliminate high-load spark blowout, stabilize secondary voltage, and restore peak combustion efficiency across all six cylinders.

The Stock F-150 Ignition Thermal Breakdown

The 3.5L twin-turbo and naturally aspirated platforms generate significant underhood thermal loads and high cylinder pressures. Over time, OEM coil insulation epoxy degrades, leading to micro-arcing, internal resistance spikes, and carbon tracking along the boot. Combined with widened spark plug gaps from electrode erosion, the ignition system struggles to deliver necessary ionization energy, resulting in low-RPM shudder, cold-start hesitation, and misfire codes under heavy boost or towing loads.

The Engineering Solution

This direct-fit service kit integrates high-conductivity electrolytic copper windings encased in reinforced, high-dielectric epoxy housings to completely seal against heat soak and moisture intrusion. Matched with fine-wire iridium spark plugs, the assembly lowers required firing voltage, provides exceptional thermal stability under sustained combustion pressure, and delivers immediate throttle response with consistent flame-front expansion.

Technical Specifications

Compatibility

• Model Years: 2011, 2012, 2013, 2014, 2015 Ford F-150
• Engine Configuration: 3.5L V6 (EcoBoost Twin-Turbo & Ti-VCT NA)
• Trim Levels: XL, XLT, Lariat, King Ranch, Platinum, Limited, FX2, FX4
• OE Interchange: UF646, UF-646, DG549, BL3Z-12029-A, BL3Z-12029-B, BL3Z-12029-C, IC749, 5C1871

The Ford Heavy-Duty Towing Standard

Engineered to handle severe duty cycles and aggressive payload demands, this ignition upgrade delivers robust spark reliability whether idling through sub-zero winter starts or pulling heavy trailers under high boost.