Best Spark Plugs for Toyota Tundra: Full-Size Truck Reliability

The Toyota Tundra has earned a reputation for exceptional long-term reliability. Whether you're running the 4.6L V8, the 5.7L V8, or the newer 3.5L twin-turbo V6, proper spark plug maintenance keeps your Tundra performing at its best for hundreds of thousands of miles.

5.7L 3UR-FE V8 (2007–2021)

This legendary Toyota V8 is one of the most durable truck engines ever built. NGK Laser Iridium plugs are OEM specification for the 5.7L. Toyota specs a 120,000-mile replacement interval — one of the longest in the industry — reflecting both NGK's quality and Toyota's conservative engineering margins.

4.6L 1UR-FE V8

The 4.6L V8 shares NGK Laser Iridium OEM specification with its larger sibling. Same 120,000-mile interval. These plugs are pre-gapped from the factory — verify gap before installing but handle carefully to avoid damaging the fine iridium tip.

3.5L Twin-Turbo V6 (2022+)

Toyota's new iForce MAX hybrid and standard 3.5TT use NGK iridium plugs spec'd for turbocharged applications. The twin-turbo system means shorter service intervals are prudent — inspect at 60,000 miles even though the OEM spec may be longer.

Towing Considerations

Tundra owners who tow heavy loads should inspect plugs at 60,000 miles even with a 120,000-mile spec. Extended towing hours put additional thermal stress on the ignition system.

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