Ignition Coil and Iridium Spark Plugs for Infiniti QX80 (2014-2023) 5.6L

Direct-Fit Ignition Coil and Iridium Spark Plug Kit for 2014-2023 Infiniti QX80

What it Does: The ignition coil and iridium spark plug kit replaces aged factory coil packs and fouled plugs on the 2014-2023 Infiniti QX80 to eliminate cylinder misfires, stabilize idle, and restore peak combustion efficiency.

The Stock Infiniti QX80 Thermal Degradation and Secondary Breakdown

The high-compression, direct-injected 5.6-liter platform generates significant under-hood thermal loads within the tight engine bay of the Z62 chassis. Over extended heat cycles, factory pencil coils suffer dielectric breakdown within the silicone boots and epoxy windings. This insulation fatigue causes internal arcing, tracking, and inconsistent secondary voltage under load. Combined with eroded factory electrodes widening the plug gap against high direct-injection cylinder pressures, the system triggers common misfire fault codes (P0300 through P0308), sluggish tip-in response, and reduced fuel economy.

The Engineering Solution

Engineered to handle sustained thermal stress, these direct-fit coil-on-plug units feature high-dielectric epoxy vacuum-poured into reinforced PBT housings, preventing voltage leaks and breakdown across the internal primary and secondary copper windings. The accompanying fine-wire iridium spark plugs feature a laser-welded center electrode and a platinum-tipped ground wire, maintaining a precise spark gap under high cylinder pressures and extreme combustion temperatures. This combination provides uniform dwell saturation, crisp spark delivery, and maximum resistance to electrical interference and spark blowout.

Technical Specifications

Compatibility

• 2014-2023 Infiniti QX80 Base 5.6L V8
• 2014-2023 Infiniti QX80 Luxe 5.6L V8
• 2014-2023 Infiniti QX80 Premium Select 5.6L V8
• 2014-2023 Infiniti QX80 Sensory 5.6L V8
• 2014-2023 Infiniti QX80 Limited 5.6L V8

Frequently Asked Questions

Does this fit the Z62 QX80?
Yes, this is a direct fit for the 2014-2023 Infiniti QX80 equipped with the VK56VD engine.

Are the included iridium spark plugs pre-gapped?
Yes, the spark plugs come pre-gapped to factory specifications, though checking gap clearance prior to installation is always recommended.

The Infiniti Towing and Heavy-Duty Standard

Whether navigating highway corridors or pulling an 8,500-lb trailer, the full-size platform demands relentless ignition stability. This comprehensive 8-cylinder refresh ensures complete combustion and reliable torque transfer throughout the power band under extreme towing loads.