What makes iridium spark plugs last longer than platinum ones?

Iridium has a much higher melting point and is significantly harder than platinum. This means the iridium tip on the center electrode can maintain its shape and sharpness for longer, providing a consistent spark over a greater number of miles.

Do these spark plugs come with anti-seize pre-applied?

These spark plugs feature trivalent metal plating on the threads, which provides excellent resistance to corrosion and seizing. While this plating helps greatly, it's always a good practice to refer to your vehicle's service manual for specific installation recommendations regarding anti-seize compound.

How many spark plugs are included in this box?

This box contains four NGK Laser Iridium spark plugs, which is the correct quantity for a 4-cylinder engine like the one found in the 2010-2013 Mazda 3.

NGK Laser Iridium Spark Plug (SILTR6A7G)

Name: NGK Laser Iridium Spark Plug (SILTR6A7G)
Brand: NGK
SKU: ngk-ngk-laser-iridium-spark-plug-siltr6a7g-pa-ng95369
Price: 13.96 USD
Availability: InStock

$13.96

In Stock

Fits 2010-2013 Mazda 3. NGK Laser Iridium spark plugs offer improved performance and durability with an iridium center electrode.

Key Features

Fits 2010-2013 Mazda 3 and 2010-2012 Mazda CX-7.
Features an iridium-tipped center electrode for improved durability and a stable spark.
Pure alumina silicate ceramic insulator offers superior strength and heat transfer.
Trivalent metal plating on threads provides excellent corrosion and anti-seizing resistance.
Platinum pad on the ground electrode ensures even wear in distributorless ignition systems.
Pure copper core helps dissipate heat effectively.

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Product Details

NGK is well-known for making reliable ignition components, and their Laser Iridium spark plugs are a prime example of that. If you're working on your 2010-2013 Mazda 3 or 2010-2012 Mazda CX-7, these are the exact type of plugs your engine was designed for. They feature an iridium-tipped center electrode, which is much harder than platinum and helps ensure a consistent, strong spark for better combustion and longer life.

These plugs are built with a pure alumina silicate ceramic insulator that offers great strength and helps transfer heat away from the tip, preventing overheating. You'll also find trivalent metal plating on the threads, which makes them resistant to corrosion and seizing, making installation and future removal much easier. The design includes a platinum pad on the ground electrode to help it wear evenly, especially in modern ignition systems, and a pure copper core that aids in heat removal. They come with triple seals to prevent any gas leakage.

This set includes four spark plugs, which is exactly what you'll need for your Mazda 3. They are designed as a direct OE replacement, meaning they fit right in without any modifications.