2022 Honda Accord Spark Plug Specs, Gap, and Torque Guide

As an ASE-certified master technician, I regularly see modern direct-injected, turbocharged vehicles roll into the shop with misfire codes simply because the wrong spark plugs were installed, or they were gapped incorrectly. The 2022 Honda Accord is a marvel of modern engineering, offering a 1.5L Turbo, a 2.0L Turbo, and a highly efficient 2.0L Hybrid powertrain. Each of these engines demands specific spark plug characteristics to run optimally.

Below is your comprehensive guide to the spark plug specifications, torque ratings, and replacement procedures for the 2022 Honda Accord.

Quick reference

(Note: Motorcraft and ACDelco are generally not recommended or available as direct OEM replacements for modern Honda engines. Stick to the OEM NGK laser iridium/platinum lines).

Why the right plug matters

Modern engines like those in the 2022 Accord rely on incredibly precise combustion timing. The heat range of a spark plug determines how quickly it transfers heat away from the firing tip into the cylinder head. If you use a plug that runs too hot in the 1.5T or 2.0T, you risk pre-ignition and catastrophic engine knock under heavy boost.

Furthermore, electrode metal is critical. The 2022 Accord requires Laser Iridium spark plugs. Iridium is significantly harder and more durable than traditional platinum or copper. While copper conducts electricity exceptionally well, it erodes rapidly and would require replacement every 20,000 miles. Iridium plugs, combined with a platinum ground electrode, easily survive the brutal pressures of a turbocharged combustion chamber for up to 100,000 miles.

How to gap a spark plug

Most NGK iridium spark plugs come pre-gapped from the factory, but you should always verify the gap before installation. Dropped boxes in shipping can easily close a gap, leading to an immediate misfire on startup.

1. Use the right tool: For precious metal plugs (iridium/platinum), avoid the cheap coin-style gap gauges. Dragging them through the gap can snap the ultra-fine iridium center electrode. Use a wire-type feeler gauge instead.
2. Checking: Gently pass the wire gauge between the electrodes. It should have a slight "drag."
3. Adjusting: If the gap needs widening, use the bending tool on the gauge to carefully apply pressure only to the ground electrode strap. Never pry against the center iridium tip. Give it a light bend, then re-check.

Replacement procedure tips

The 2022 Honda Accord utilizes a Coil-On-Plug (COP) ignition system, meaning there is no distributor or high-tension spark plug wires. Instead, an individual ignition coil sits directly on top of each spark plug.

• Coil removal: Always unclip the wiring harnesses carefully. The plastic connectors become brittle due to under-hood heat. Remove the 10mm securing bolt and pull the coil straight up.
• The anti-seize debate: NGK spark plugs feature a specialized trivalent metal plating. NGK explicitly states not to use anti-seize compound on their plated plugs. Applying anti-seize acts as a lubricant, which alters torque readings and can easily lead to over-torquing and snapping the plug in the cylinder head. Install them dry.
• Dielectric grease: Apply a small dab of dielectric grease inside the rubber boot of the ignition coil before reinstalling. This prevents moisture intrusion, stops high-voltage tracking, and ensures the boot won't bake onto the ceramic insulator of the new plug.

Known issues

Unlike the notorious Ford 3-valve engines that suffer from cracked porcelain and broken 2-piece plug shells, or the GM 5.3s with hyper-sensitive ionization coils, the modern Honda L-series and K-series engines are quite robust when it comes to ignition hardware.

However, because the 1.5L and 2.0L are Direct Injected (DI), fuel never washes over the back of the intake valves. If you experience rough idling or misfires even after replacing the spark plugs, the issue may not be ignition-related. Carbon buildup on the intake valves or sticking fuel injectors are common culprits in higher-mileage DI engines. Always check for proper plug torque, as a loose plug can cause blow-by and melt the ignition coil.

Need plugs replaced? Find a shop on Repairius.