Ignition Coil & Iridium Spark Plugs for Infiniti I35 (2002-2004) 3.5L V6

Complete Ignition Coil & Iridium Spark Plugs for 2002-2004 Infiniti I35

Restores optimal combustion efficiency and eliminates persistent misfires for the VQ35DE engine. This comprehensive six-pack of direct-replacement ignition coils and high-performance iridium spark plugs replaces worn factory ignition components to stabilize idle quality, restore lost acceleration, and correct standard coil-related diagnostic trouble codes.

The Stock A33 Ignition Weakness

The factory ignition coils on the 3.5L VQ35DE are notoriously prone to thermal degradation due to their placement directly atop the cylinder head, subjected to relentless heat cycles over thousands of miles. This aggressive heat soak breaks down the internal epoxy potting and primary winding insulation, leading to voltage leaks and weak spark delivery. Drivers typically experience random cylinder misfires (codes P0300 through P0306), hesitant throttle response under load, and significantly reduced fuel economy as unburned hydrocarbons exit through the exhaust system.

The Engineering Solution

These replacement ignition coils are engineered with high-dielectric epoxy and superior copper wire windings to resist thermal breakdown and ensure consistent voltage output even under extreme operating temperatures. The boot assemblies feature high-grade silicone to prevent moisture intrusion and electrical arcing. Paired with the included high-performance iridium spark plugs, which feature an ultra-fine center electrode for focused ignition and a remarkably high melting point, this kit delivers a robust, reliable spark. This translates to complete combustion, a smooth idle, and maximum energy transfer to the VQ35DE power plant without the typical lifespan limitations of standard copper or platinum alternatives.

Technical Specifications

Compatibility

• 2002 Infiniti I35 3.5L V6
• 2003 Infiniti I35 3.5L V6
• 2004 Infiniti I35 3.5L V6

The Infiniti Caliber

Engineered to match the smooth power delivery and refinement expected of Japanese luxury sedans, this ignition kit ensures your VQ35DE continues to operate with precision, delivering a robust power band without CEL interruptions or compromised drivability.