Ignition Coil and Iridium Spark Plugs for Jeep Wrangler (2012-2018) 3.6L

Direct-Fit Ignition Coil and Iridium Spark Plug Service Kit for 2012-2018 Jeep Wrangler

What it Does: Restores factory secondary ignition output, eliminates high-load misfires, and stabilizes idle combustion across all six cylinders on the 3.6L Pentastar engine.

The Stock Wrangler Thermal Degradation Weakness

Under-hood temperatures in the JK engine bay accelerate insulation breakdown in factory coil packs. Over time, thermal cycling causes micro-fractures in the internal epoxy resin and degradation of the silicone spark plug boots. This leads to secondary voltage leakage, carbon tracking, and high-RPM misfires (DTC P0300 through P0306). Simultaneously, factory standard spark plug electrodes erode, widening the gap and placing excessive electrical resistance and strain on the powertrain control module's internal coil drivers.

The Engineering Solution

This complete ignition overhaul kit pairs high-grade copper primary and secondary windings with premium dielectric housing to resist voltage arching under heavy engine load. The coil assemblies feature reinforced silicone boots and direct-fit blade terminals for maximum conductivity. Paired with fine-wire iridium-tipped spark plugs, this kit provides a concentrated spark kernel, superior anti-fouling resistance, and consistent flame propagation without degrading under sustained off-road heat.

Technical Specifications

Compatibility

• 2012-2018 Jeep Wrangler 3.6L V6 (JK / JKU)
• Includes 2-Door and 4-Door Unlimited configurations (Sport, Sahara, Rubicon)

The Jeep Trail-Ready Standard

Engineered to withstand prolonged low-speed crawling and heavy towing demands, this ignition setup delivers dependable cold starts and uninterrupted combustion under extreme off-road operating environments.