Ignition Coil & Iridium Spark Plugs for Infiniti EX35 (2008-2012) 3.5L

Direct-Fit Ignition Coil & Iridium Spark Plugs for 2008-2012 Infiniti EX35 (VQ35HR / J50)

Direct Replacement Ignition System: Restores peak combustion efficiency and eliminates misfires by replacing degraded OEM coils and worn spark plugs with precisely calibrated high-voltage components.

The Stock EX35 Ignition Degradation

The factory VQ35HR ignition coils are notoriously susceptible to thermal degradation over high mileage. Located deep within the engine bay, these coils endure relentless heat cycling that eventually breaks down internal epoxy potting. This thermal stress leads to micro-cracking in the primary and secondary windings, causing voltage leaks, erratic spark timing, and increased electrical resistance. Concurrently, factory platinum or standard plugs suffer from electrode erosion, widening the spark gap and increasing the voltage demand on already compromised coils. The result is a cascade of drivability issues: rough idling, hesitation under load, diminished fuel economy, and persistent P0300-series misfire trouble codes.

The Engineering Solution

This comprehensive ignition kit engineered for the J50 chassis directly addresses these thermal and electrical shortcomings. The replacement ignition coils feature upgraded dielectric epoxy resins and heavily insulated copper windings, optimizing energy transfer and significantly raising the thermal threshold against heat soak. By delivering a more consistent, higher-voltage output to the combustion chamber, these coils ensure complete fuel atomization. Paired with ultra-fine wire iridium spark plugs, the system requires lower firing voltage while providing superior resistance to gap erosion compared to standard OEM plugs. The iridium center electrode concentrates the electrical charge, creating a highly stable and focused spark front. This precise mechanical pairing prevents unburned fuel from fouling the catalytic converters, stabilizes idle vacuum, and restores factory throttle response across the entire VQ35HR RPM band.

Technical Specifications

Compatibility

• 2008 Infiniti EX35 Base 3.5L V6
• 2008 Infiniti EX35 Journey 3.5L V6
• 2009 Infiniti EX35 Base 3.5L V6
• 2009 Infiniti EX35 Journey 3.5L V6
• 2010 Infiniti EX35 Base 3.5L V6
• 2010 Infiniti EX35 Journey 3.5L V6
• 2011 Infiniti EX35 Base 3.5L V6
• 2011 Infiniti EX35 Journey 3.5L V6
• 2012 Infiniti EX35 Base 3.5L V6
• 2012 Infiniti EX35 Journey 3.5L V6

The Infiniti Precision Standard

Designed to meet strict JDM engine tolerances, this ignition overhaul kit ensures reliable starting, smooth power delivery, and the elimination of erratic check engine lights, keeping your VQ35HR operating at exact factory calibration.