Ignition Coil and Iridium Spark Plugs for Scion xA (2004-2006) 1.5L

Direct-Fit Ignition Coil & Iridium Spark Plug Tune-Up Kit for 2004-2006 Scion xA

Primary Function: Restores factory ignition energy, cold-start reliability, and complete cylinder combustion by replacing heat-degraded coil packs and worn spark plugs.

The Stock xA Ignition Breakdown

Under continuous thermal cycling in the compact 1NZ-FE engine bay, the OEM coil-on-plug boots and internal potting epoxy degrade. This causes dielectric breakdown, primary resistance drift, and high-voltage arc leakage down the plug tube. Coupled with worn factory plugs with eroded gaps, the system triggers intermittent P0300-P0304 misfires, erratic idle, reduced fuel economy, and hesitation under load.

The Engineering Solution

This comprehensive ignition kit pairs high-dielectric coil assemblies with long-life fine-wire iridium spark plugs. The direct-fit coil-on-plug units are engineered with high-purity internal copper windings, durable thermoplastic housings, and corrosion-resistant blade terminals for maximum conductivity. The fine-wire iridium center electrodes lower the required ignition voltage, generating a concentrated, high-temperature flame kernel that guarantees efficient flame propagation and reliable combustion stability.

Technical Specifications

Compatibility

• 2004 Scion xA Base Hatchback 1.5L L4 (1NZ-FE)
• 2005 Scion xA Base Hatchback 1.5L L4 (1NZ-FE)
• 2006 Scion xA Base Hatchback 1.5L L4 (1NZ-FE)

The Scion Reliability Standard

Engineered for high-revving Japanese compact applications, this kit delivers exact factory timing synchronization, crisp throttle response, and dependable emission compliance for your daily-driven 1NZ-FE.