Ignition Coil and Iridium Spark Plugs for Nissan Frontier (2005-2019) 2.5L

Direct-Fit Ignition Coil & Iridium Spark Plug Service Kit for 2005-2019 Nissan Frontier

What it Does: Restores factory secondary ignition output and combustion efficiency across all four cylinders to resolve misfires, rough idle, and unburned hydrocarbon emissions.

The Stock Frontier Secondary Ignition Breakdown

The factory coil-on-plug modules on the QR25DE engine endure severe thermal cycling within the recessed cylinder head plug wells. Over extended mileage, sustained heat soak degrades internal epoxy insulation and copper wire winding integrity. This causes high-voltage dielectric breakdown, intermittent spark blowout under load, and common P0300-P0304 misfire diagnostic codes. Concurrently, worn factory spark plugs widen the gap, placing excessive current demand on aging ignition coils.

The Engineering Solution

This complete ignition kit features direct-fit coil packs engineered with high-purity internal copper windings, durable thermoplastic housings, and factory-correct blade connectors for optimal electrical conductivity. Paired with fine-wire iridium spark plugs, the setup requires lower arc voltage while providing high thermal resistance and dependable flame kernel development. The result is balanced cylinder combustion, crisp throttle response, and extended service intervals.

Technical Specifications

Compatibility

• 2005-2019 Nissan Frontier King Cab (2.5L I4 QR25DE)
• 2005-2019 Nissan Frontier Base, S, SV, XE Trims (2.5L I4 QR25DE)

The Nissan Durability Standard

Engineered to withstand daily fleet, utility, and hauling workloads without thermal degradation or ignition signal loss.