<h2>Direct-Fit OEM Replacement Ignition Coil and Iridium Spark Plug Kit for 2011-2016 Ford Explorer</h2> <p><strong>What it Does:</strong> Direct-fit secondary ignition overhaul kit engineered to restore precise spark timing, eliminate cylinder misfires, and maintain complete combustion efficiency across all six cylinders.</p> <h3>The Stock Explorer Ignition Coil Breakdown</h3> <p>The factory ignition coils on the transverse-mounted Duratec 35 V6 endure heavy heat cycling, particularly along Bank 1 tucked underneath the intake manifold. Over time, OEM potting compound degrades, resulting in internal dielectric breakdown, thermal micro-cracking, and carbon tracking. Combined with worn factory plug gaps that increase required arc voltage, the OEM coils suffer insulation puncture, causing rough idle, hesitations under load, reduced fuel economy, and P0300-P0306 diagnostic trouble codes.</p> <h3>The Engineering Solution</h3> <p>This comprehensive service kit pairs six high-dielectric coil-on-plug assemblies with six pre-gapped fine-wire iridium spark plugs. The coils utilize premium electrolytic copper windings and impact-resistant thermoplastic housings to resist thermal fatigue and prevent voltage leakage. The fine-wire iridium center electrodes demand significantly lower ignition voltage to initiate spark, ensuring rapid flame kernel expansion, crisp throttle response, and dependable cold starts under high cylinder pressures.</p> <h3>Technical Specifications</h3> <table width="100%" style="border-collapse: collapse; border: 1px solid #e0e0e0; font-size: 14px;"> <tr style="background-color: #f9f9f9;"> <td style="padding:8px;"><strong>Fitment</strong></td> <td style="padding:8px;">2011-2016 Ford Explorer</td> </tr> <tr> <td style="padding:8px;"><strong>Engine / Chassis</strong></td> <td style="padding:8px;">3.5L Duratec 35 (Cyclone) V6 / U502</td> </tr> <tr style="background-color: #f9f9f9;"> <td style="padding:8px;"><strong>Stock Output</strong></td> <td style="padding:8px;">290 hp / 255 lb-ft (Approx)</td> </tr> <tr> <td style="padding:8px;"><strong>Part Number</strong></td> <td style="padding:8px;">UF553, DG520, CY0118100B, CY01-18-100A, 7T4Z12029E</td> </tr> </table> <h3>Compatibility</h3> <ul> <li>2011-2016 Ford Explorer Base 3.5L V6 Naturally Aspirated</li> <li>2011-2016 Ford Explorer XLT 3.5L V6 Naturally Aspirated</li> <li>2011-2016 Ford Explorer Limited 3.5L V6 Naturally Aspirated</li> </ul> <h3>The Ford Durability Standard</h3> <p>Built to handle continuous family hauling, long-distance road trips, and light towing duty, this ignition package delivers consistent high-output secondary voltage to keep your U502 Explorer running at factory efficiency and peak power delivery.</p>