Ignition Coil + Spark Plugs for Jeep Commander Grand Cherokee (2009-2010) 3.7L

Direct-Fit Ignition Coil & Spark Plug Kit for 2009-2010 Jeep Commander, Grand Cherokee

What it Does: The Ignition Coil and Spark Plug Kit restores factory secondary ignition voltage and primary combustion efficiency on the 2009-2010 Commander and Grand Cherokee to eliminate cylinder misfires, unstable idling, and unburned fuel delivery under load.

The Stock Jeep Commander & Grand Cherokee Ignition Degradation

The factory waste-spark ignition design on the 3.7L PowerTech EKG engine subjects its coil packs to intense underhood thermal cycling in both WK and XK engine bays. Over time, the original coil casing epoxy develops micro-fractures, allowing dielectric breakdown and high-voltage arc-over to ground. Simultaneously, extended service intervals erode spark plug electrodes, widening the gap and placing excessive electrical resistance on the secondary windings. This thermal degradation triggers hesitation, diagnostic trouble codes (P0300–P0306), and unburned hydrocarbons contaminating the catalytic converters.

The Engineering Solution

This comprehensive service kit replaces worn ignition hardware with three dual-tower direct-mount coils and six matched spark plugs. The ignition coils feature heat-resistant epoxy potting and high-grade copper primary and secondary windings to ensure maximum dielectric strength and thermal resistance against engine bay heat soak. Matched with factory-specified spark plugs engineered for rapid heat dissipation and stable arc transfer, this kit restores crisp throttle response, stabilizes idle load, and protects PCM ignition drivers from high-voltage flyback.

Technical Specifications

Compatibility

• 2009-2010 Jeep Grand Cherokee (WK) 3.7L V6
• 2009-2010 Jeep Commander (XK) 3.7L V6

Frequently Asked Questions

Does this fit the WK and XK Commander and Grand Cherokee?
Yes, this is a direct fit for the 2009-2010 Jeep Commander (XK) and Grand Cherokee (WK) equipped with the 3.7L PowerTech EKG engine.

Why does this kit include three coils for a six-cylinder engine?
The 3.7L PowerTech utilizes a waste-spark configuration where three direct-mounted dual-output coils each fire one primary plug directly and one paired cylinder via a cross-over plug wire.

The Jeep Durability Standard

Engineered to handle sustained trail crawls, steep grades, and heavy payload towing, these ignition components provide steady spark delivery under maximum cylinder pressure, preventing misfires when your rig demands peak low-end torque.