2024 Toyota Camry Spark Plug Type, Gap, and Torque Specs

As an ASE-certified master technician, I regularly field questions about routine maintenance for modern daily drivers. The 2024 Toyota Camry is an incredibly reliable vehicle, but just like any internal combustion engine, it eventually needs fresh spark plugs to maintain optimum fuel efficiency, idle smoothness, and performance.

Below is your comprehensive guide to the correct spark plug part numbers, gap specifications, torque values, and replacement intervals for the 2024 Toyota Camry, covering both the 2.5L inline-4 and 3.5L V6 engines.

Quick reference: 2024 Toyota Camry Spark Plug Specs

Note: Always verify exact part numbers with your VIN at the dealership, as emissions packages can occasionally alter OEM parts.

Why the right plug matters

Choosing the correct spark plug is about much more than making the engine run; it's about making it run right. Modern engines like the Dynamic Force 2.5L are highly sensitive to heat ranges. The heat range dictates how fast the spark plug pulls heat away from its firing tip. If a plug is too hot, it can cause pre-ignition and engine knock. Too cold, and it will foul out with carbon deposits.

Electrode material is equally critical. The 2024 Camry utilizes factory iridium spark plugs. While copper plugs offer excellent conductivity, they wear out in as little as 30,000 miles. Platinum plugs stretch that to about 60,000 miles. Iridium is significantly harder and more durable, allowing Toyota to confidently recommend a 120,000-mile replacement interval without sacrificing spark efficiency. Never downgrade an engine designed for iridium to platinum or copper.

How to gap a spark plug

The OEM Denso and NGK iridium plugs come pre-gapped from the factory for your 2024 Camry. However, as a master tech, I never install a plug without verifying the gap first—shipping and handling drops can easily bend an electrode.

To check the gap safely on an iridium plug:

1. Use a wire gauge or feeler gauge, not a cheap coin-style tool. Coin tools can easily snap the brittle, fine-wire iridium tip.
2. Gently slide the 0.031" (0.8 mm) wire between the center and ground electrode. It should pass through with a slight "drag."
3. If the gap needs adjustment, use a proper bending tool to apply pressure only to the ground strap. Never pry against the center iridium electrode.

Replacement procedure tips

The 2024 Camry uses a Coil-on-Plug (COP) ignition system, meaning each cylinder has its own individual ignition coil mounted directly on top of the spark plug.

• Access: The 2.5L 4-cylinder is a breeze; the coils are right on top. The 3.5L V6 is much more labor-intensive. The intake manifold plenum must be removed to access the rear bank of cylinders (bank 1) located against the firewall.
• The Anti-Seize Debate: Toyota and modern plug manufacturers (like NGK and Denso) use a specialized trivalent metal plating on their spark plug threads. Do not use anti-seize on these plugs. Adding anti-seize acts as a lubricant, which alters your torque readings and can easily lead to over-tightening and stripped cylinder head threads. Install them dry.
• Dielectric Grease: Apply a small dab of dielectric grease inside the tip of the ignition coil boot before reinstalling. This prevents moisture intrusion, stops high-voltage tracking, and ensures the rubber boot doesn't bake onto the ceramic plug housing over the next 120,000 miles.

Known issues

While the dreaded 2-piece spark plug breakage issues (infamously found on older Ford 3-valve engines) and ignition coil failures common on certain GM V8s are completely absent from this Toyota platform, the V6 Camry does have one caveat. Because the rear plugs are difficult to reach, some owners or inexperienced shops will only change the front three plugs, leaving the rear factory plugs in far beyond their 120,000-mile lifespan. This inevitably leads to a rear-bank misfire and potential catalytic converter damage. Always ensure all six plugs are replaced at the same time.

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