Ignition Coil & Iridium Spark Plugs for Infiniti Q50 Q70 (2014-2018) 3.5L

OEM-Grade Ignition Coil & Iridium Spark Plugs for 2014-2018 Infiniti Q50, Q70 (VQ35HR / V37 & Y51)

Restores Peak Ignition Timing: Replaces degraded factory coils and fouled plugs to ensure complete combustion and consistent spark delivery across the entire RPM range.

The Stock Q50, Q70 VQ35HR Thermal Degradation Problem

Factory ignition coils on the 3.5L VQ35HR engines are highly susceptible to thermal degradation over time. Positioned tightly within the aluminum cylinder heads, the coils are subjected to intense, continuous heat cycles. This prolonged exposure breaks down the internal epoxy potting and the external rubber boots, leading to microscopic cracking. Once the dielectric insulation is compromised, high voltage arcs directly to the engine block instead of bridging the spark plug gap. This voltage leak causes distinct mechanical symptoms: persistent misfires, a rough and stumbling idle, noticeable hesitation under acceleration, and compromised fuel economy, which is especially disruptive to the hybrid drivetrain synchronization found in these specific chassis.

The Engineering Solution

This ignition coil and iridium spark plug kit is engineered to directly resolve OEM thermal failures. The upgraded coils feature heavy-duty internal copper windings surrounded by a high-dielectric thermal epoxy resin, maximizing voltage output while resisting extreme engine bay temperatures. Paired with these coils are premium iridium spark plugs, utilizing an ultra-fine wire center electrode and a laser-welded ground electrode. Iridium's exceptionally high melting point ensures the spark gap remains perfectly consistent over thousands of heat cycles, preventing voltage blowout under heavy engine load. Together, this optimized system guarantees rapid flame kernel growth for complete combustion, restoring lost torque, stabilizing the idle, and eliminating intermittent misfire codes.

Technical Specifications

Compatibility

• 2014-2018 Infiniti Q50 (3.5L V6 Hybrid)
• 2014-2018 Infiniti Q70 (3.5L V6 Hybrid)

The Infiniti Precision Caliber

For high-performance JDM luxury platforms, maintaining precise ignition timing is crucial for reliable power delivery. This matched ignition kit ensures your VQ35HR operates at absolute peak efficiency, restoring factory power delivery without triggering Check Engine Lights.