Ignition Coil + Spark Plugs for Toyota Sequoia (2001-2004) 4.7L

Direct-Fit Ignition Coil & Platinum Spark Plug Kit for 2001-2004 Toyota Sequoia (UCK35/UCK45)

What it Does: The Ignition Coil and Spark Plug Kit replaces worn factory ignition components on the 2001-2004 Toyota Sequoia to eliminate cylinder misfires, restore fuel economy, and stabilize combustion under load.

The Stock Toyota Sequoia Ignition Degradation

Under repeated thermal cycling, the factory coil-on-plug units on the 2UZ-FE engine suffer from dielectric breakdown and micro-cracking within the internal epoxy resin. High underhood temperatures degrade the silicone boot seals, allowing moisture intrusion and secondary voltage leakage to the spark plug tube walls. Simultaneously, electrode erosion on aged spark plugs increases the required firing voltage, placing excess impedance on aging factory UF230 coils. This manifests as hesitation under acceleration, erratic idle, reduced towing torque, and persistent P0300–P0308 diagnostic trouble codes.

The Engineering Solution

This complete refresh kit restores secondary ignition stability using high-temp resistant components engineered for the demands of the 4.7L V8 platform. The replacement coils feature reinforced magnetic cores, high-grade copper primary and secondary windings, and high-dielectric epoxy potting to withstand heavy thermal loads without internal arc-over. Paired with matched platinum spark plugs featuring fine-wire center electrodes, this setup lowers the required breakdown voltage, minimizes quenching, and ensures clean flame kernel propagation during cold starts and high-load towing.

What's Included

• 8 Energy Ignition Coils (Replacement for UF230)
• 8 Platinum Spark Plugs

Technical Specifications

Compatibility

• 2001-2004 Toyota Sequoia SR5 4.7L V8
• 2001-2004 Toyota Sequoia Limited 4.7L V8

Frequently Asked Questions & Fitment Warnings

Does this fit the UCK35/UCK45 Sequoia?

Yes, this kit is engineered specifically for the 2001-2004 Toyota Sequoia equipped with the non-VVT-i 2UZ-FE 4.7L V8 engine. This kit does not fit 2005 and newer VVT-i models or other engine variants.

Are spark plug wires included with this kit?

No, the 4.7L 2UZ-FE utilizes an independent coil-on-plug design with direct harness connectors, eliminating traditional secondary spark plug wires entirely.

The Toyota Endurance Standard

The first-generation Sequoia is built for severe-duty hauling, payload carrying, and high-mileage durability. Refreshing both coils and plugs simultaneously guarantees uniform cylinder-to-cylinder resistance, protecting your catalytic converters and ensuring maximum torque delivery when pulling heavy loads.