Ignition Coil and Iridium Spark Plugs for Lincoln MKX (2011-2015) 3.7L
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Direct-Fit Ignition Coil and Iridium Spark Plug Service Kit for 2011-2015 Lincoln MKX
Primary Function: Restores factory secondary ignition performance by replacing worn coil packs and degraded spark plugs to eliminate misfires, rough idle, and unburned fuel conditions under load.
The Stock MKX Cyclone Ignition Breakdown
The 3.7L Duratec 37 V6 engine utilizes high under-hood packaging density within the CD3 chassis, exposing the factory coil-on-plug (COP) assemblies to extreme thermal cycling. Over time, heat soak degrades the internal epoxy encapsulation and causes micro-cracking in the primary and secondary copper windings. Simultaneously, factory spark plug electrode gaps expand due to electrical erosion, increasing the required firing voltage. This compounded secondary resistance causes spark blow-out, catalytic converter-damaging misfires (P0300–P0306), and sluggish throttle response under heavy engine load.
The Engineering Solution
This direct-replacement service kit provides six precision-wound coil packs paired with six fine-wire iridium spark plugs. The ignition coils feature high-conductivity internal copper windings and durable dielectric housings that resist thermal degradation and electrical leakage. The companion iridium spark plugs feature a laser-welded center electrode that requires lower strike voltage while resisting carbon fouling and gap erosion, ensuring consistent combustion propagation and stable idle characteristics.
Technical Specifications
| Fitment | 2011-2015 Lincoln MKX |
| Engine / Chassis | 3.7L Cyclone (Duratec 37) V6 / U388 (CD3) |
| Stock Output | 305 hp / 280 lb-ft (Approx) |
| Part Number / Interchange | UF553, DG520, CY0118100B, CY01-18-100A, 7T4Z12029E |
Compatibility
- 2011 Lincoln MKX Base 3.7L V6 Gas (Chassis: U388)
- 2012 Lincoln MKX Base 3.7L V6 Gas (Chassis: U388)
- 2013 Lincoln MKX Base 3.7L V6 Gas (Chassis: U388)
- 2014 Lincoln MKX Base 3.7L V6 Gas (Chassis: U388)
- 2015 Lincoln MKX Base 3.7L V6 Gas (Chassis: U388)
The Lincoln Reliability Standard
Engineered to meet rigorous OEM secondary ignition tolerances, this kit ensures dependable cold starts, smooth power delivery, and CEL-free operation under demanding towing and luxury commuting conditions.
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