2024 Honda Accord Spark Plug Type, Gap & Torque Specs

When it's time to maintain your 2024 Honda Accord, having the correct spark plug specifications is crucial to preserving the performance and fuel efficiency you expect from your vehicle. As an ASE-certified master technician, I always stress the importance of using the exact OEM-specified plugs, especially on modern turbocharged and hybrid engines.

Below is your complete guide to the 2024 Honda Accord spark plug types, gap specifications, torque settings, and installation procedures.

Quick Reference

(Note: Always verify part numbers with your VIN as manufacturers occasionally update supercessions.)

Why the Right Plug Matters

Modern engines like the 1.5L Turbo and the 2.0L Hybrid in the 2024 Accord are highly sensitive to spark plug specifications.

Heat Range: The heat range determines how fast the plug dissipates heat. Use a plug that runs too hot, and you risk severe pre-ignition and engine damage (especially on the 1.5L Turbo). Run one too cold, and the plug will foul with carbon. Electrode Material: Honda specifies Laser Iridium spark plugs for the 2024 Accord. Iridium is significantly harder and more durable than traditional copper or platinum. This allows for an ultra-fine center electrode that provides a concentrated, efficient spark while lasting upwards of 100,000 miles. Never downgrade to platinum or copper plugs in this vehicle.

How to Gap a Spark Plug

OEM NGK and Denso iridium plugs come pre-gapped from the factory. However, shipping and handling can sometimes alter the gap. It is vital to check the gap before installation, but you must do it carefully!

1. Use a Wire-Style Gauge: Do not use a traditional coin-style ramp gauge on iridium plugs. The fragile iridium tip can easily snap off. Use a wire-style feeler gauge.
2. Measuring: Gently pass the wire through the gap. It should slide through with a light drag.
3. Adjusting: If the gap is too tight, use the bending tool on the gauge to slightly bend the ground strap outward. Never pry against the center iridium electrode! If it is too loose, lightly tap the ground strap on a hard surface to close it.

Replacement Procedure Tips

Replacing spark plugs on the 2024 Accord is relatively straightforward, as both the 1.5L and 2.0L engines use a Coil-on-Plug (COP) ignition system.

• Coil-on-Plug Removal: Disconnect the negative battery terminal. Unclip the electrical connectors to the ignition coils, remove the 10mm securing bolts, and gently twist and pull the coils straight up.
• The Anti-Seize Debate: NGK spark plugs feature a special trivalent metal plating that acts as a release agent. Do not use anti-seize on these threads. Adding anti-seize acts as a lubricant, which often results in over-torquing and potential cylinder head damage. Install them dry.
• Dielectric Grease: Apply a small pea-sized amount of dielectric grease to the inside of the ignition coil boot. This prevents moisture intrusion, stops high-voltage tracking, and ensures the boot won't bake onto the ceramic plug over the next 100,000 miles.
• Torque It Right: Always use a calibrated torque wrench. Thread the plugs in by hand using a spark plug socket and extension to prevent cross-threading, then torque them to 13 lb-ft (18 Nm).

Known Issues

Fortunately, the 2024 Honda Accord does not suffer from the infamous spark plug extraction nightmares seen in other vehicles (like the broken two-piece plug shells on the older Ford 3-valve V8s, or the specialized ionization-sensing coil issues on GM 5.3L engines). The aluminum cylinder heads on the Honda engines hold up exceptionally well.

However, one issue to watch out for on the 1.5L Turbo is spark plug fouling or cracking if the engine experiences severe carbon buildup or is subjected to low-speed pre-ignition (LSPI) from using incorrect engine oil or poor-quality fuel. Always use Top Tier gasoline and the correct ILSAC GF-6 oil to prevent this.

Need plugs replaced? Find a shop on Repairius.