Ignition Coil and Iridium Spark Plugs for Lexus ES (1999-2003) 3.0L

Direct-Fit Ignition Coil & Iridium Spark Plug Service Kit for 1999-2003 Lexus ES

Primary Function: Restores factory secondary ignition output, eliminates misfire codes, and stabilizes combustion cycles across all six cylinders on the 3.0L V6 platform.

The Stock ES Secondary Ignition Degradation

Transverse-mounted V6 platforms trap excessive thermal energy across the rear cylinder bank. Over extended heat cycles, factory coil pack epoxy degrades, causing micro-fractures in the housing that lead to high-voltage dielectric breakdown and spark leakage to ground. Simultaneously, aging standard copper or platinum plugs experience electrode erosion, widening plug gaps and driving up primary coil resistance. The resulting weak spark event triggers rough idling, hesitation under load, poor fuel atomization, and OBD-II misfire DTCs (P0300-P0306).

The Engineering Solution

This comprehensive tune-up kit combines six reinforced coil-on-plug assemblies with six laser-welded iridium spark plugs. The ignition coils feature high-conductivity internal copper windings insulated with premium thermal-resistant resin to prevent voltage bleed under sustained engine bay heat. Paired with fine-wire iridium center electrodes, this system lowers required ionization voltage while providing a focused, ultra-stable thermal kernel for clean, complete fuel burn under variable valve timing (VVT-i) loads.

Technical Specifications

Compatibility

• 1999 Lexus ES300 3.0L V6 (1MZ-FE)
• 2000 Lexus ES300 3.0L V6 (1MZ-FE)
• 2001 Lexus ES300 3.0L V6 (1MZ-FE)
• 2002 Lexus ES300 3.0L V6 (1MZ-FE)
• 2003 Lexus ES300 3.0L V6 (1MZ-FE)

The Lexus Reliability Standard

Engineered to meet exact JDM OEM resistance tolerances and dwell angle requirements, ensuring factory-smooth idle quality, seamless throttle response, and zero check engine lights.