Ignition Coil & Iridium Spark Plugs for Infiniti M35h (2012-2013) 3.5L

Direct Replacement Ignition Coil & Iridium Spark Plugs for 2012-2013 Infiniti M35h (VQ35HR / Y51)

What it Does: Restores optimal combustion and eliminates high-RPM misfires by replacing degrading factory ignition components with high-output coils and long-life iridium spark plugs.

The Stock M35h Ignition Weakness

The Y51 chassis equipped with the VQ35HR hybrid powertrain demands precise spark timing for seamless transitions between electric and internal combustion modes. Factory ignition coils undergo severe thermal stress due to the dense engine bay packaging and repetitive auto-start/stop cycles inherent to the hybrid system. Over time, the OEM coil epoxy degrades, leading to micro-cracking and internal voltage leaks. This thermal breakdown causes weak spark energy, translating to rough idle, reduced fuel efficiency, hesitation during motor transition phases, and eventual engine misfires under load.

The Engineering Solution

This ignition coil and iridium spark plug kit is engineered to exceed OEM thermal and voltage thresholds. The coils feature upgraded primary and secondary copper windings encased in high-temperature epoxy, ensuring consistent high-voltage output even during extreme heat cycling. The accompanying spark plugs utilize a laser-welded iridium center electrode and a platinum ground electrode, significantly reducing the required firing voltage while providing a stable, concentrated spark. This optimizes the air-fuel burn in the VQ35HR’s combustion chamber, ensuring a smooth hybrid transition, restoring lost power, and protecting the catalytic converters from unburned fuel saturation.

Technical Specifications

Compatibility

• 2012 Infiniti M35h 3.5L V6 Hybrid
• 2013 Infiniti M35h 3.5L V6 Hybrid

The Infiniti Precision Standard

Precision matters on a JDM luxury chassis. Maintaining optimal ignition health ensures the VQ35HR engine delivers the linear power delivery, smooth hybrid transitions, and unwavering reliability expected from the Y51 platform without throwing stubborn check engine lights.