Ignition Coil & Iridium Spark Plugs for Lexus IS300 IS300C IS350 (2005-2011) 3.0L 3.5L V6

High-Performance Ignition Coil & Iridium Spark Plugs for 2005-2011 Lexus IS

Provides a complete replacement of the factory ignition system with upgraded coils and iridium spark plugs to restore consistent spark timing and maximize combustion efficiency in 3.0L and 3.5L V6 engines.

The Stock IS Ignition Failure Points

The OEM ignition coils on the XE20 Lexus IS, particularly those paired with the 2GR-FSE and 3GR-FE V6 engines, are notoriously susceptible to thermal degradation. Positioned directly above the cylinder head, these factory coils endure severe heat soak cycles that eventually break down the internal epoxy potting and primary windings. As the electrical resistance builds over thousands of miles, the spark output weakens. This breakdown leads to micro-misfires, rough idling, hesitation under heavy throttle, and decreased fuel economy. Furthermore, running worn factory spark plugs increases the voltage demand on these already stressed coils, accelerating the cycle of electrical failure.

The Engineering Solution

This comprehensive ignition overhaul addresses these thermal vulnerabilities by utilizing premium-grade copper wiring within the primary and secondary coil assemblies, significantly lowering electrical resistance and operating temperatures. The upgraded coil housing is injection-molded from a high-dielectric polymer, effectively insulating the internal components against intense engine bay heat soak while preventing arcing or voltage leaks to the block. Paired with fine-wire iridium spark plugs, this kit optimizes spark energy transfer. The iridium center electrodes require less firing voltage and concentrate the spark kernel for a more complete fuel burn, delivering OE+ durability, sharper throttle response, and a stable idle without triggering Check Engine Lights.

Technical Specifications

Compatibility

• 2005-2011 Lexus IS300 3.0L V6
• 2005-2011 Lexus IS300C 3.0L V6
• 2005-2011 Lexus IS350 3.5L V6

The Lexus Precision Standard

Engineered specifically for high-compression Toyota and Lexus V6 engines, this direct-replacement ignition package ensures precise engine timing, eliminates random misfires, and restores the smooth, responsive power delivery expected from a luxury sports sedan.