Ignition Coil and Iridium Spark Plugs for Infiniti QX56 (2011-2013) 5.6L

Direct-Fit Ignition Coil and Iridium Spark Plug Kit for 2011-2013 Infiniti QX56

What it Does: The direct-fit ignition kit replaces fatigued factory coil packs and degraded spark plugs on the 2011-2013 Infiniti QX56 to eliminate secondary voltage leakage, resolve misfire codes, and restore factory combustion efficiency.

The Stock Infiniti QX56 Ignition Breakdown

Under the high thermal loads of the Z62 chassis engine bay, factory ignition coils experience accelerated dielectric breakdown. The direct-injected VK56VD 5.6L V8 operates under high cylinder pressures and lean-burn scenarios, which place heavy demands on the secondary winding circuits. Over time, prolonged exposure to heat cycles causes the factory epoxy potting to micro-fracture and the rubber boots to harden. This degradation allows high-voltage arc tracking, carbon tracking down the plug insulator, and persistent misfires under load (DTC P0300 through P0308). Concurrently, worn factory plug gaps widen, increasing electrical resistance and accelerating primary driver strain.

The Engineering Solution

This complete tune-up kit features eight high-output coil-on-plug units engineered with high-dielectric epoxy potting, thermal-resistant silicone boots, and high-conductivity copper wiring to prevent internal shorting and voltage flashover. Matched with eight fine-wire iridium spark plugs, this setup lowers required firing voltages, enhances flame kernel propagation, and maintains high spark stability under wide-open throttle. Designed to match OE dwell profiles, it restores crisp throttle response and clean combustion without ECU calibration changes.

Technical Specifications

Compatibility

• 2011 Infiniti QX56 Base 5.6L V8 (VK56VD) RWD / 4WD
• 2012 Infiniti QX56 Base 5.6L V8 (VK56VD) RWD / 4WD
• 2013 Infiniti QX56 Base 5.6L V8 (VK56VD) RWD / 4WD

Frequently Asked Questions

Does this fit the Z62 QX56?
Yes, this is a direct fit for the 2011-2013 Infiniti QX56 equipped with the VK56VD direct-injection 5.6L engine.

Are the iridium spark plugs pre-gapped for this application?
The iridium plugs are pre-gapped to factory specifications for direct-injected 5.6L applications, but verifying gap clearance prior to installation is always standard practice.

The Infiniti Towing & Endurance Standard

The full-size Z62 platform relies on uncompromised low-end torque to manage its 8,500-pound tow rating. Restoring proper spark delivery ensures continuous combustion stability under sustained towing loads, steep grades, and high ambient temperatures.