Ignition Coil & Iridium Spark Plugs for Infiniti G35 (2003-2006) 3.5L
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Direct-Replacement Ignition Coil & Iridium Spark Plugs for 2003-2006 Infiniti G35
Restores proper spark energy and resolves hesitation by replacing thermally degraded OE ignition components on the VQ35DE platform.
The Stock G35 Ignition Shortcomings
The factory VQ35DE ignition coils in the V35 chassis are highly susceptible to internal epoxy degradation and thermal breakdown caused by extreme heat soak from the 3.5L V6 aluminum block. Over thousands of heat cycles, the OEM coil casings develop microscopic cracks, allowing moisture intrusion and secondary voltage leaks to the cylinder head. This mechanical fatigue manifests as erratic idling, noticeable hesitation under heavy engine load, and common P0300-series cylinder misfire codes. Additionally, degraded standard spark plugs increase the electrical resistance the weakened coils must overcome, severely compounding the inefficient combustion cycle and negatively affecting fuel trims.
The Engineering Solution
This ignition overhaul rectifies VQ35DE spark decay by combining upgraded heavy-duty ignition coils with highly conductive iridium spark plugs. The coils utilize a high-temperature epoxy resin and dense copper primary and secondary windings to increase thermal shock resistance and guarantee consistent voltage transfer under extreme engine bay temperatures. Paired with iridium spark plugs—featuring an ultra-fine center electrode and an exceptionally high melting point of over 4,000°F—this hardware lowers the required firing voltage while delivering a more concentrated spark kernel. The mechanical result is optimized flame propagation, stabilized idle RPMs, and restored fuel efficiency without the premature gap erosion typical of factory materials.
Technical Specifications
| Fitment | 2003-2006 Infiniti G35 |
| Engine / Chassis | VQ35DE / V35 |
| Stock Output | 260-298 hp / 260-270 lb-ft (Approx) |
| Part Number | 22448-8J115, UF349 |
Compatibility
- 2003 Infiniti G35 3.5L V6 VQ35DE
- 2004 Infiniti G35 3.5L V6 VQ35DE
- 2005 Infiniti G35 3.5L V6 VQ35DE
- 2006 Infiniti G35 3.5L V6 VQ35DE
The Infiniti Engineering Caliber
The JDM standard dictates exact engineering tolerances and consistent power delivery throughout the entire RPM band. Replacing fatigued factory components with precision-engineered ignition hardware ensures your V35 maintains the reliable throttle response, smooth acceleration, and stable idle required from the high-revving VQ platform.
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