Ignition Coil and Iridium Spark Plugs for Toyota Yaris (2007-2018) 1.5L

Direct-Fit Ignition Coil and Iridium Spark Plug Kit for 2007-2018 Toyota Yaris

Restores primary ignition energy and flame propagation to eliminate misfires, rough idling, and hesitation in 1.5L 4-cylinder engines.

The Stock Yaris Secondary Ignition Breakdown

With prolonged thermal cycling and high mileage, factory coil-on-plug packs on the 1NZ-FE platform suffer from dielectric breakdown within the internal resin and insulation. This degradation leads to high-voltage arcing, unburnt fuel delivery, and recurring P0300-P0304 misfire diagnostic trouble codes. Concurrently, factory plug gap growth increases the secondary ignition voltage demand, overloading aged coil windings and causing severe power loss under load.

The Engineering Solution

This complete ignition kit features four heavy-duty coil-on-plug units engineered with premium copper windings, direct-fit blade terminal connectors, and heat-resistant elastomer boots to shield against flashover and thermal fatigue. Matched with four fine-wire iridium spark plugs requiring lower arc voltage and offering exceptional thermal conductivity, this package delivers consistent spark duration, crisp throttle response, and complete combustion across the entire RPM band.

Technical Specifications

Compatibility

• 2007-2018 Toyota Yaris Base, CE, LE, L, SE (1.5L L4 Gas 1NZ-FE)
• Interchange Numbers: UF316, 90919-02240, 90919-02265, C1304, 5C1293

The Toyota JDM Efficiency Standard

Built to strictly mirror OE dwell time parameters and output current, this ignition set preserves fuel economy, emissions compliance, and daily engine smoothness without triggering secondary circuit DTCs.