2019 Toyota Camry Spark Plug Type, Gap & Torque Specs

Quick Reference: 2019 Toyota Camry Spark Plugs

Why the Right Spark Plug Matters

Choosing the correct spark plug isn't just about finding one that threads in; it's critical for engine performance, efficiency, and longevity. Modern engines like those in the 2019 Camry are precisely engineered, and the spark plug is a key component in that system.

• Heat Range: A spark plug must get hot enough to burn off carbon deposits for a clean firing surface, but not so hot that it pre-ignites the fuel mixture (a damaging condition called "knock" or "pinging"). The factory-specified Denso plugs are "hot" enough for clean operation but "cold" enough to prevent detonation under all operating loads.
• Electrode Material: The 2019 Camry engines use Iridium-tipped spark plugs from the factory. Iridium is an extremely hard and dense precious metal, which allows manufacturers to create a very fine-wire center electrode. This sharp point requires less voltage to create a spark, making for a more consistent and powerful ignition event compared to older platinum or copper plugs. While less expensive, using copper or platinum plugs in an engine designed for iridium will result in a much shorter service life and potentially reduced fuel economy and power.

How to Gap a Spark Plug

Properly gapping a spark plug ensures the spark has the perfect distance to jump, creating the most effective flame kernel to ignite the air-fuel mixture. For the 2019 Camry, both the 4-cylinder and V6 engines require a gap of 0.043 inches (1.1mm).

1. Use the Right Tool: Use a wire-loop or feeler gauge gapping tool. Avoid the cheap "coin-style" gap tools, as they can put pressure on the fragile center electrode and damage it.
2. Check the Gap: Slide the correct wire gauge (0.043") between the center and ground electrodes. It should slide through with a slight drag. Most modern Iridium plugs come pre-gapped, but it's crucial to verify the gap on every single plug. Shipping and handling can easily close the gap.
3. Adjust Carefully: If the gap is too tight, use the small prying feature on your gapping tool to gently bend the ground strap (the curved piece of metal over the center electrode) outwards. If it's too wide, you can gently tap the end of the ground strap on a clean, hard surface. Always re-check the gap after an adjustment. Never put any pressure on the center electrode.

Replacement Procedure Tips

The 2019 Camry uses a modern coil-on-plug ignition system, which makes replacement straightforward.

• Coil-on-Plug Removal: Each spark plug has its own ignition coil sitting directly on top of it, held down by a single 10mm bolt. Unplug the electrical connector, remove the bolt, and gently twist and pull the coil straight up to remove it. The spark plug is located down in the tube.
• Anti-Seize Debate: The question of whether to use anti-seize compound on the spark plug threads is a hot topic. NGK and Denso, the OEM suppliers, advise against it. Their plugs feature a special trivalent plating that acts as its own anti-seize and corrosion inhibitor. Applying additional anti-seize can act as a lubricant, leading you to over-torque the plug, which can stretch the threads in the aluminum cylinder head. We recommend following the plug manufacturer's advice: install them dry and clean.
• Dielectric Grease: It is highly recommended to apply a small amount of dielectric grease to the inside of the ignition coil boot before reinstalling it. This grease prevents the boot from getting stuck to the spark plug porcelain, makes future removal easier, and helps seal out moisture.

Known Issues

Fortunately, the engines in the 2019 Toyota Camry do not have any widely known, persistent issues related to spark plug design or failure. Unlike the notorious two-piece spark plugs on some Ford 3-valve engines that would break off in the head, or ionization-sensing issues on certain GM engines, the Toyota A25A and 2GR engines have a robust and reliable ignition system design. Following the correct torque spec is the most important factor in preventing problems.

Need plugs replaced? Find a shop on Repairius.