2025 Toyota Tacoma: Spark Plug Specifications

Quick Reference: 2025 Toyota Tacoma Spark Plug Specifications

Why The Right Spark Plug Matters

The spark plugs in your Tacoma's engine are small, but they play a giant role in performance, fuel economy, and emissions. Choosing the correct plug is critical.

• Heat Range: This is the plug's ability to dissipate heat. A "hotter" plug retains more heat to burn off carbon deposits in a low-speed engine, while a "colder" plug dissipates heat more quickly to prevent pre-ignition (knock) in a high-performance, high-heat engine like the turbocharged i-FORCE. The factory-specified Denso and NGK plugs have the correct heat range for your engine.
• Electrode Material:
  • Iridium: The 2025 Tacoma uses iridium-tipped spark plugs from the factory. Iridium is an extremely hard, precious metal that resists wear far better than other materials. This allows for a very fine center electrode, which requires less voltage to create a spark, and a service life of 100,000 miles or more.
  • Platinum: A good alternative to iridium, often with a slightly shorter lifespan of 60,000-80,000 miles.
  • Copper: The classic choice. Coppers are excellent conductors but wear out much faster, typically needing replacement every 20,000-30,000 miles. They are not recommended for the 2025 Tacoma.

How to Gap a Spark Plug

Even pre-gapped plugs should be checked. The trip from the factory to your engine bay can be a bumpy one.

1. Use the Right Tool: A wire-style or feeler gauge is best. Avoid the cheap "coin-style" gappers, as they can put too much pressure on the fragile iridium tip and break it.
2. Check the Gap: Slide the correct wire (0.031" or 0.8mm) between the center and ground electrodes. You should feel a slight drag, but it shouldn't be difficult to insert.
3. Adjust Carefully: If adjustment is needed, only bend the ground strap (the curved piece of metal over the top). Use a dedicated tool or gently tap the strap on a hard surface to close the gap, or lightly pry against the base to open it. Never touch or put pressure on the center electrode.

Replacement Procedure Tips for the 2025 Toyota Tacoma

The 2.4L i-FORCE engines use a modern coil-on-plug ignition system, which simplifies replacement.

• Coil-on-Plug Removal: After removing the engine cover, you will see the individual ignition coils bolted down over each spark plug. Unplug the electrical connector, unbolt the 10mm hold-down bolt, and gently twist and pull the coil straight up to remove it.
• The Anti-Seize Debate: This is a hot topic. Modern NGK and Denso plugs have a special trivalent plating that acts as its own anti-seize. Adding more can alter the torque reading, leading you to over-tighten the plug. For the 2025 Tacoma, we recommend installing the plugs dry (no anti-seize) and torquing them to the exact specification (13 lb-ft).
• Dielectric Grease: A small amount of dielectric grease applied to the inside of the coil boot (where it slips over the spark plug's porcelain) is highly recommended. This prevents the boot from sticking to the plug, makes future removal easier, and keeps moisture out.

Known Issues

Fortunately, the engine platforms for the 2025 Toyota Tacoma are new and not associated with major, widespread spark plug issues like those seen in the past on other vehicles.

• No 2-Piece Plugs: The infamous Ford 3-valve engine issue with 2-piece spark plugs breaking in the cylinder head does not apply here. The Tacoma uses a robust, single-piece plug design.
• Standard Coils: Unlike some GM 5.3L engines, the Tacoma does not use special ionization-sensing ignition coils, simplifying diagnostics and replacement.

The primary concern is ensuring you use a quality, correctly gapped iridium plug and tighten it to the precise torque specification to avoid any potential damage to the aluminum cylinder head.

Need plugs replaced? Find a shop on Repairius.