Ignition Coil + Spark Plugs for Toyota 4Runner (1997-1998) 2.7L

Direct-Fit Ignition Coil and Spark Plug Kit for 1997-1998 Toyota 4Runner (N180)

What it Does: The ignition coil and Denso platinum spark plug kit replaces aged factory ignition components on the 1997-1998 Toyota 4Runner to eliminate secondary voltage leaks and restore efficient combustion under heavy load.

The Stock Toyota 4Runner Ignition Breakdown

The factory wasted-spark system on the 3RZ-FE 2.7L engine subjects its twin dual-output coils to severe thermal cycling within the engine bay. Over time, internal winding insulation cracks, primary resistance increases, and silicone boots harden. This dielectric degradation leads to micro-arcing and secondary spark blow-out, resulting in P0300-P0304 cylinder misfires, unburned hydrocarbon buildup, rough idle, and significant loss of low-end torque during towing or steep trail ascents.

The Engineering Solution

This direct-replacement ignition package features two high-dielectric epoxy-potted coils engineered to match factory dwell times and step-up ratios without straining the factory igniter circuit. Paired with Denso Platinum (4503) spark plugs, the fine-wire center electrode lowers the required breakdown voltage and resists erosion under high cylinder pressures. Together with copper-wound primary cores and reinforced boots, this kit restores crisp throttle response and clean flame-kernel propagation throughout the RPM range.

What's Included

• 2x Direct-Fit Ignition Coils (OEM Spec UF180)
• 4x Denso Platinum Spark Plugs (4503)

Technical Specifications

Compatibility

• 1997 Toyota 4Runner Base 2.7L 4-Cylinder (3RZ-FE Engine)
• 1998 Toyota 4Runner Base 2.7L 4-Cylinder (3RZ-FE Engine)

Frequently Asked Questions & Fitment Warnings

Does this fit the N180 4Runner?

Yes, this is a direct fit for the 1997-1998 Toyota 4Runner equipped with the 3RZ-FE 2.7L engine. This kit does not fit 3.4L 5VZ-FE V6 models or 1996 models utilizing a mechanical distributor.

Are secondary spark plug wires included with this kit?

Spark plug wires are not included; this wasted-spark package includes the 2 ignition coils and 4 spark plugs only.

The Toyota Durability Standard

Built to handle continuous off-highway vibration and sustained engine operating temperatures, this ignition hardware ensures your utility truck maintains dependable torque delivery on technical grades and remote trails.