Ignition Coil + Iridium Spark Plugs for Hyundai Tucson (2018-2021) 2.4L

Direct-Fit Ignition Coil and Iridium Spark Plug Service Kit for 2018-2021 Hyundai Tucson

What it Does: The ignition coil and iridium spark plug kit replaces degraded factory ignition components on the 2018-2021 Hyundai Tucson 2.4L to restore combustion efficiency, eliminate cylinder misfires, and stabilize idle quality.

The Stock Hyundai Tucson Ignition Breakdown

The direct-injected Theta II GDI powerplant in the TL chassis Tucson places severe thermal demands on the secondary ignition system. Over time, engine bay heat cycles degrade the internal copper windings and breakdown the epoxy insulation inside factory 273002GGA0 coil packs. This thermal stress causes micro-arcing, dielectric punch-through, and high-rpm voltage drop. Concurrently, factory plugs suffer electrode erosion from lean GDI combustion ratios, widening the gap and forcing deteriorating coils to generate higher breakdown voltages, ultimately triggering P0300-P0304 misfire codes, hesitations under load, and unburned fuel entering the catalytic converter.

The Engineering Solution

This comprehensive tune-up kit features four coil-on-plug units engineered with high-dielectric epoxy potting, reinforced thermoplastic boots, and premium primary/secondary copper windings designed to resist thermal breakdown and carbon tracking. Paired with four fine-wire iridium-tipped spark plugs, this kit provides a concentrated, low-voltage arc capable of reliable ignition within high-pressure direct-injection combustion chambers. The high melting point of iridium minimizes electrode erosion, preserving precise factory spark gap tolerances and ensuring clean flame kernel propagation under load.

Technical Specifications

Compatibility

• 2018 Hyundai Tucson 2.4L 4-Cylinder
• 2019 Hyundai Tucson 2.4L 4-Cylinder
• 2020 Hyundai Tucson 2.4L 4-Cylinder
• 2021 Hyundai Tucson 2.4L 4-Cylinder

Frequently Asked Questions

Does this fit the TL Tucson?
Yes, this is a direct fit for the 2018-2021 Hyundai Tucson equipped with the 2.4L Theta II GDI engine.

Should spark plugs and coil packs always be replaced at the same time?
Yes, pairing fresh iridium plugs with new coils ensures uniform secondary resistance across all cylinders, preventing premature coil failure from excessive gap strain.

The Hyundai Commuter Reliability Standard

Designed for straightforward plug-and-play installation, this ignition kit delivers reliable cold starts, smooth power delivery, and factory diagnostic compliance without the need for ECU recalibration.