Ignition Coil + Spark Plugs for Infiniti Q45 (2002-2006) 4.5L

Direct-Fit Ignition Coil and Spark Plug Tune-Up Kit for 2002-2006 Infiniti Q45 (F50)

What it Does: The ignition coil and spark plug kit replaces worn factory ignition components on the 2002-2006 Infiniti Q45 to eliminate cylinder misfires, stabilize idle quality, and restore peak combustion efficiency.

The Stock Infiniti Q45 Thermal Breakdown

Underhood heat soak inside the cramped engine bay of the F50 chassis takes a heavy toll on factory electronics. Over heat cycles, the original coil pack epoxy insulation degrades, creating micro-fractures in the casing. This leads to internal dielectric breakdown, secondary winding voltage leakage, and incomplete combustion in the VK45DE engine. Compounding this, aged spark plugs with eroded ground electrodes demand higher firing voltage from stressed coils, triggering intermittent misfires (P0300–P0308 codes), hesitant acceleration, and unburnt hydrocarbon buildup in the catalytic converters.

The Engineering Solution

This comprehensive service pack replaces all eight coil-on-plug units and spark plugs simultaneously to re-establish balanced impedance across all banks. Manufactured with high-conductivity copper primary and secondary windings, each coil delivers consistent high-voltage output across high-RPM operation. Reinforced silicone boots prevent spark flashover to the aluminum cylinder head, while matching precision-gapped spark plugs offer optimal heat dissipation and anti-fouling durability under continuous thermal load.

Technical Specifications

Compatibility

• 2002-2006 Infiniti Q45 4.5L V8 (VK45DE Engine)

Frequently Asked Questions

Does this fit the F50 Q45?

Yes, this is a direct fit for the 2002-2006 Infiniti Q45 equipped with the VK45DE engine.

Should spark plugs and coils always be replaced as a complete set?

Replacing coils and plugs together ensures balanced secondary resistance across all cylinders, eliminating uneven idle and preventing old plugs from prematurely overworking new coil windings.

The Infiniti Benchmark

Engineered to meet the tight tolerances of Nissan's flagship 32-valve V8, this ignition package delivers precise flame kernel propagation to maintain the smooth, responsive power delivery expected from an executive performance sedan.