Ignition Coil and Iridium Spark Plugs for Toyota Tacoma (2016-2020) 3.5L

Direct-Fit Ignition Coil and Iridium Spark Plug Kit for 2016-2020 Toyota Tacoma

What it Does: The Ignition Coil and Iridium Spark Plug Kit restores factory combustion efficiency and delivers high-dielectric spark energy to resolve misfires and rough idling in the 2016-2020 Toyota Tacoma.

The Stock Toyota Tacoma Thermal Degradation and Secondary Breakdown

Under continuous load and frequent thermal cycling, the factory coil-on-plug pencil units on the N300 chassis suffer from internal dielectric insulation breakdown. Operating inside deep spark plug wells, high underhood operating temperatures cause epoxy micro-cracking and thermal breakdown of the internal copper secondary windings. Paired with extended 100,000-mile service intervals on the 2GR-FKS, worn spark plug electrode gaps place excess electrical resistance on the OEM coils. This chain reaction triggers high-load secondary ignition flashover, sporadic P0300-P0306 DTC misfire codes, hesitations during high-load towing transitions, and degraded fuel economy from incomplete flame kernel propagation.

The Engineering Solution

This complete six-cylinder ignition service kit pairs heavy-duty coil-on-plug boots and windings with ultra-fine-wire iridium spark plugs to re-establish primary and secondary circuit integrity. The pencil coils feature high-conductivity copper primary and secondary windings encased in void-free vacuum-potted epoxy to eliminate internal arcing and dielectric fatigue. High-temp silicone boots with internal stainless steel suppression springs isolate against flashover down into the cylinder head. The included spark plugs utilize a laser-welded 0.6mm fine-wire iridium center electrode and platinum-tipped ground electrode, lowering required breakdown voltage while providing extreme resistance to electrical spark erosion, carbon fouling, and combustion chamber oxidation.

Technical Specifications

Compatibility

• 2016 Toyota Tacoma 3.5L V6 (SR, SR5, TRD Sport, TRD Off-Road, Limited)
• 2017 Toyota Tacoma 3.5L V6 (SR, SR5, TRD Sport, TRD Off-Road, Limited, TRD Pro)
• 2018 Toyota Tacoma 3.5L V6 (SR, SR5, TRD Sport, TRD Off-Road, Limited, TRD Pro)
• 2019 Toyota Tacoma 3.5L V6 (SR, SR5, TRD Sport, TRD Off-Road, Limited, TRD Pro)
• 2020 Toyota Tacoma 3.5L V6 (SR, SR5, TRD Sport, TRD Off-Road, Limited, TRD Pro)

Frequently Asked Questions

Does this fit the N300 Tacoma?
Yes, this is a direct fit for the 2016-2020 Toyota Tacoma equipped with the 2GR-FKS engine.

Are these spark plugs pre-gapped for the 3.5L V6?
Yes, they are factory pre-gapped to OEM specifications, though checking electrode gap prior to installation is recommended practice.

The Toyota Durability Standard

Engineered to handle sustained high-load hauling and steep off-road trail climbs, this ignition service kit ensures consistent flame-front development and dependable cold-start behavior without ignition-induced torque sag.