Ignition Coil & Iridium Spark Plugs for Jeep Grand Cherokee (2016-2026) 3.6L V6

Direct-Fit Ignition Coil & Iridium Spark Plugs for 2016-2026 Jeep Grand Cherokee (3.6L Pentastar / WK2 & WL)

What it Does: This complete ignition service kit directly replaces the factory coils and spark plugs to restore optimal spark energy, smooth out idle, and prevent misfires under load.

The Stock Grand Cherokee Ignition Weakness

The 3.6L Pentastar V6 is a robust powerplant, but its ignition components are highly susceptible to thermal degradation. Constant heat cycling within the engine bay gradually breaks down the internal epoxy insulation of the OEM coil packs. Concurrently, factory spark plugs experience electrode erosion. As the plug gap widens beyond factory specifications (typically after 60,000 miles), the required firing voltage spikes. This increased resistance heavily strains the ignition coil windings, leading to internal shorts, voltage leaks, and the inevitable P0300 to P0306 misfire trouble codes, especially noticeable during heavy acceleration, hill climbing, or towing.

The Engineering Solution

This direct-replacement ignition kit resolves these failure points by utilizing upgraded internal materials. The included ignition coils feature high-grade copper wire windings and a premium dielectric epoxy resin to effectively resist heat soak and prevent high-voltage arching. These coils are paired with six precision-manufactured iridium spark plugs. The ultra-fine iridium center electrode significantly lowers the required firing voltage while offering superior resistance to electrical wear and oxidation compared to traditional platinum or copper variants. Featuring OEM-style female blade connectors, the coils plug directly into the factory wiring harness, ensuring weather-tight, secure connections that restore factory throttle response, emissions compliance, and combustion efficiency.

Technical Specifications

Compatibility

• 2016-2026 Jeep Grand Cherokee 3.6L V6 (All Trims: Laredo, Limited, Trailhawk, Overland, Summit)

The Jeep Durability Standard

Whether you are commuting daily, navigating off-road trails, or hauling a trailer, restoring your Pentastar's ignition system is critical. This direct-replacement kit ensures consistent power delivery, stabilizes fuel economy, and guarantees reliable engine performance under the most demanding load conditions.