Ignition Coil and Iridium Spark Plugs for Hyundai Sonata (2016-2019) 2.0L

Direct-Replacement Ignition Coil and Iridium Spark Plug Kit for 2016-2019 Hyundai Sonata

Complete Ignition System Refresh: Replaces degraded factory coil packs and worn spark plugs to restore high-voltage spark energy, instantaneous throttle response, and complete combustion efficiency.

The Stock Sonata Dielectric Degradation Issue

Under continuous thermal cycling and direct-injection combustion pressures, factory coil-on-plug assemblies suffer internal dielectric insulation breakdown. Over time, high cylinder head heat degrades the internal potting epoxy and increases secondary copper winding resistance. This electrical leakage causes weak spark energy, partial combustion, hesitation under boost, rough idle, and intermittent P0300-P0304 misfire fault codes.

The Engineering Solution

This direct-fit kit features four coil packs manufactured with high-density, oxygen-free copper primary and secondary windings paired with high-temperature dielectric epoxy encapsulation to prevent voltage tracking and flashover. Paired with fine-wire iridium-tipped center electrode spark plugs, this assembly lowers quenching effects, reduces the voltage required to bridge the gap, and provides sustained arc stability under peak cylinder pressures.

Technical Specifications

Compatibility

• 2016 Hyundai Sonata 2.0L L4 (Gas / Turbo)
• 2017 Hyundai Sonata 2.0L L4 (Gas / Turbo)
• 2018 Hyundai Sonata 2.0L L4 (Gas / Turbo)
• 2019 Hyundai Sonata 2.0L L4 (Gas / Turbo)

The Hyundai Reliability Standard

Engineered to exact OEM terminal and mounting tolerances, this kit installs seamlessly without wire harness modification, ensuring zero-CEL operation, smooth cold starts, and rock-solid drivability under load.