Ignition Coil & Iridium Spark Plugs for Toyota Tundra (2007-2020) 4.6L 5.7L V8

Reliable Ignition Coil & Iridium Spark Plugs for 2007-2020 Toyota Tundra

Restores peak combustion efficiency: This direct-replacement ignition coil and Denso iridium spark plug set eliminates misfires and stabilizes idle in the 1UR-FE and 3UR-FE V8 engines.

The Stock Tundra Ignition Degradation

The OEM ignition system on the XK50 Tundra is prone to degradation over high mileage, primarily due to thermal cycling and prolonged heat soak within the deep V8 cylinder banks. Factory coils eventually suffer from primary winding breakdown and cracked epoxy housings, leading to voltage leaks and weak spark propagation. Simultaneously, standard plugs experience rapid electrode erosion under heavy towing loads. This degradation manifests as rough idling, reduced fuel economy, hesitation under load, and cylinder-specific misfire codes (P0300 through P0308) which severely cripple the towing capability of the naturally aspirated V8 platform.

The Engineering Solution

This comprehensive ignition kit pairs high-output ignition coils with pre-gapped iridium spark plugs to provide a robust, long-term fix. The replacement coils are wound with premium heavy-gauge copper wiring and encapsulated in high-dielectric epoxy resin to resist extreme under-hood temperatures and prevent voltage flash-over. The accompanying spark plugs utilize an ultra-fine iridium center electrode combined with a laser-welded ground electrode, ensuring a concentrated, consistent spark that maximizes flame kernel expansion. This precise combustion event restores the stoichiometric efficiency of the 4.6L and 5.7L engines, stabilizing idle, eliminating hesitation, and optimizing power delivery when hauling heavy payloads.

Technical Specifications

Compatibility

• 2007-2020 Toyota Tundra 4.6L V8 (1UR-FE)
• 2007-2020 Toyota Tundra 5.7L V8 (3UR-FE)

The Toyota Towing Standard

Built for the grueling demands of heavy hauling and off-road recovery, these ignition components restore the legendary durability and pulling power expected from Toyota's UR V8 platform.

Common Questions

Which Toyota Tundra V8 engines does this ignition coil and spark plug kit fit?
This kit fits the second-generation (XK50) Toyota Tundra equipped with the 5.7L V8 (3UR-FE) from 2007 to 2020 and the 4.6L V8 (1UR-FE) from 2010 to 2019.

Will this kit fit a 2007-2009 Toyota Tundra with the 4.7L V8?
This set is engineered specifically for the 4.6L (1UR-FE) and 5.7L (3UR-FE) UR-series V8 engines.

What is included in this tune-up kit?
The kit includes a complete set of direct-replacement high-output ignition coils and pre-gapped Denso iridium spark plugs for all 8 cylinders.

Are the iridium spark plugs pre-gapped for installation?
Yes, the included Denso iridium spark plugs come pre-gapped with an ultra-fine iridium center electrode and laser-welded ground electrode for direct installation.

What engine symptoms does replacing worn coils and plugs address?
Replacing degraded factory coils and eroded plugs helps resolve cylinder misfire codes (P0300-P0308), rough idling, and hesitation under heavy towing loads.