Ignition Coil and Iridium Spark Plugs for Chevrolet Sonic (2012-2020) 1.4L

Direct-Fit Ignition Coil Pack and Iridium Spark Plug Kit for 2012-2020 Chevrolet Sonic (T300)

What it Does: The Ignition Coil Pack and Iridium Spark Plug Kit replaces worn ignition components on the 2012-2020 Chevrolet Sonic to eliminate ignition misfires and restore combustion efficiency under boost.

The Stock Chevrolet Sonic Ignition Breakdown

The factory Ecotec LUJ/LUV 1.4L Turbo relies on a monolithic four-cylinder coil cassette mounted directly over the aluminum cylinder head. Prolonged thermal cycling in tight engine bays causes microscopic dielectric breakdown in the epoxy resin and boots. Over time, internal resistance surges and secondary winding degradation induce severe spark blowout, resulting in diagnostic trouble codes P0300 through P0304, hesitation under boost load, and premature erosion of standard spark plug gaps.

The Engineering Solution

This comprehensive tune-up kit features an upgraded one-piece ignition cassette matched with 4 fine-wire iridium spark plugs. Engineered to replace OEM part numbers UF669 and 55579072, the cassette utilizes high-temp silicone boots and a factory-pinned 7-pin electrical connector for plug-and-play installation. The fine-wire iridium center electrodes demand significantly less firing voltage, delivering exceptional flame kernel growth and consistent spark discharge across the 0.9–1.0 mm factory gap under high manifold pressures.

What's Included

• 1 Ignition Coil Pack (4-cylinder cassette, black)
• 4 Iridium Spark Plugs (14mm thread, 16mm hex, 19mm reach)

Technical Specifications

Compatibility

• 2012-2020 Chevrolet Sonic 1.4L L4 Turbo (Manual and Automatic transmissions)

Frequently Asked Questions & Fitment Warnings

Does this fit the T300 Sonic?

Yes, this is a direct fit for the 2012-2020 Chevrolet Sonic equipped with the LUJ/LUV 1.4L Turbo engine. This kit does not fit Sonic models equipped with the naturally aspirated 1.8L engine.

Do I need to apply dielectric grease during installation?

Applying a thin film of dielectric grease inside the boot ends prevents voltage arcing and ensures boots do not bond to the plug ceramics over time.

The Chevrolet Performance Caliber

Built to handle the heat and cylinder pressures of modern forced-induction commuter platforms, this ignition system delivers uncompromising spark reliability to maximize your turbocharged powerband.