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

High-Output Ignition Coil & Iridium Spark Plugs for 2012-2018 Jeep Wrangler (3.6L Pentastar / JK)

What it Does: Replaces degrading OEM ignition components to restore optimal spark timing, resolve intermittent misfires, and improve combustion efficiency in the 3.6L Pentastar V6.

The Stock Wrangler Ignition Degradation

The factory ignition system on the 2012-2018 Jeep Wrangler JK is highly susceptible to thermal degradation and secondary voltage drops over high mileage. Operating within the heat-soaked engine bay of the 3.6L Pentastar V6, OEM coil packs frequently experience internal insulation breakdown and increased primary resistance. This thermal cycling leads to weak spark delivery and cylinder misfires—especially under heavy loads, low-speed crawling, or towing. Furthermore, standard factory spark plugs suffer from accelerated electrode wear, widening the spark gap beyond optimal specifications. This widened gap forces the coil packs to work harder, accelerating component failure and severely compromising throttle response and fuel economy.

The Engineering Solution

This ignition coil and iridium spark plug kit is engineered to provide consistent, high-voltage spark delivery under extreme thermal loads. The upgraded ignition coils feature reinforced dielectric epoxy and superior copper wire winding density, ensuring a stronger electromagnetic field and faster recharge times. This minimizes voltage bleed-off and prevents high-load spark blowout. Paired with laser-welded iridium center electrode spark plugs, the kit is designed to ensure a stabilized spark gap that massively outlasts standard OEM variants. The advanced iridium construction requires less firing voltage while providing a highly concentrated spark kernel, translating to smoother idle characteristics, eliminated hesitation, and restored mechanical timing accuracy.

Technical Specifications

Compatibility

• 2012-2018 Jeep Wrangler JK Rubicon 3.6L V6
• 2012-2018 Jeep Wrangler JK Sahara 3.6L V6
• 2012-2018 Jeep Wrangler JK Sport 3.6L V6
• 2012-2018 Jeep Wrangler JK Unlimited (4-Door) 3.6L V6

The Jeep Durability Standard

Engineered for the rigorous demands of the trail, this ignition upgrade ensures your JK Wrangler maintains bulletproof reliability, consistent power delivery, and optimal torque when navigating steep inclines or turning oversized mud-terrain tires.

Common Questions

Will this ignition coil and spark plug kit fit my 2018 Jeep Wrangler?
This kit fits the 2018 Jeep Wrangler JK equipped with the 3.6L Pentastar V6. For the 2018 model year, it is made specifically for the JK body style using UF648 / 05149168AJ style coils.

Does this fit both 2-door and 4-door Unlimited models?
Yes, it fits all 2012-2018 Jeep Wrangler JK 2-door and 4-door Unlimited models with the 3.6L V6, including Sport, Sahara, and Rubicon trims.

What is included in this kit?
The kit includes a matched set of upgraded high-output ignition coils with reinforced dielectric epoxy and laser-welded iridium center electrode spark plugs for the 3.6L V6.

Which engine is this ignition kit designed for?
This kit is engineered specifically for the 2012-2018 Jeep Wrangler JK equipped with the 3.6L Pentastar V6 engine.

What symptoms does this ignition kit help resolve?
It replaces heat-degraded factory ignition parts to resolve cylinder misfires, weak spark under heavy load or towing, rough idle, and throttle hesitation.