Ignition Coil & Iridium Spark Plugs for Infiniti Q70L (2014-2019) 3.7L V6

High-Output Ignition Coil & Iridium Spark Plug Kit for 2014-2019 Infiniti Q70

Restores optimal combustion and eliminates misfires by replacing degrading factory ignition coils and fouled plugs with thermally-resistant coils and pre-gapped iridium spark plugs.

The Stock VQ37VHR Ignition Degradation

The 3.7L VQ37VHR engine is notorious for generating substantial under-hood temperatures, which subjects the factory ignition coils to severe thermal cycling. Over 60,000 to 80,000 miles, the epoxy potting within the OEM coils begins to crack, leading to voltage leaks, intermittent misfires, and a compromised spark duration. Simultaneously, standard factory nickel or worn platinum spark plugs suffer from electrode erosion under high compression, increasing the gap size. This forces the ignition coils to work harder to jump the gap, accelerating coil failure, reducing fuel efficiency, and causing a noticeable hesitation during wide-open throttle transitions.

The Engineering Solution

This replacement ignition suite directly addresses the VQ37VHR's thermal and electrical bottlenecks. The upgraded ignition coils feature reinforced dielectric epoxy and high-temperature silicone boots that resist heat soak and prevent voltage arcing to the cylinder head. By wrapping the primary and secondary copper windings in advanced thermal sheathing, energy transfer remains consistent even under extreme engine loads. Paired with high-performance iridium spark plugs, which feature a micro-sized center electrode and a precise pre-set gap of 0.8mm-0.9mm, this 12-piece kit delivers a highly concentrated spark. Iridium's exceptional melting point prevents electrode degradation, outlasting traditional nickel and platinum plugs while requiring less firing voltage, ultimately restoring lost horsepower and stabilizing the idle.

Technical Specifications

Compatibility

• 2014 Infiniti Q70 3.7L V6
• 2015 Infiniti Q70 3.7L V6
• 2016 Infiniti Q70 3.7L V6
• 2017 Infiniti Q70 3.7L V6
• 2018 Infiniti Q70 3.7L V6
• 2019 Infiniti Q70 3.7L V6
• 2015-2019 Infiniti Q70L 3.7L V6

The Infiniti Precision Standard

For JDM luxury platforms like the Y51 chassis, maintaining exact electrical tolerances is critical for smooth VVEL (Variable Valve Event and Lift) operation. This complete ignition overhaul ensures the VQ engine delivers consistent power delivery and maintains a stable idle, keeping your Q70 running at peak factory caliber without triggering frustrating check engine lights.