Best Spark Plugs for Mazda 3 in 2023

Finding the best spark plug for your Mazda 3 can be a challenge. With so many brands and models out there, it’s hard to know which one is right for you.

Luckily, this article will provide you with an in-depth look at some of the best spark plugs for Mazda 3 on the market today.

Top 3 Best Spark Plugs for Mazda 3

Understanding the Importance of Spark Plugs

Spark plugs play a crucial role in your car’s ignition system. They ignite the air-fuel mixture in the combustion chamber, creating the power needed to propel your vehicle. Over time, spark plugs wear out and may cause a decrease in performance, misfires, and even engine damage. Regularly inspecting and replacing spark plugs is vital to maintain your Mazda 3’s performance.

Types of Spark Plugs

There are four main types of spark plugs available on the market. Each type has its advantages and disadvantages, so understanding their differences is essential when choosing the best spark plugs for your Mazda 3.

Copper Spark Plugs: Copper spark plugs are the most affordable and have the shortest lifespan. They are ideal for older vehicles with low-voltage ignition systems but may not be suitable for modern Mazda 3 models with high-performance engines.

Platinum Spark Plugs: Platinum spark plugs have a longer lifespan than copper plugs, thanks to their platinum center electrode. They offer improved performance, fuel efficiency, and durability, making them suitable for most Mazda 3 models.

Iridium Spark Plugs: Iridium spark plugs are more expensive than platinum plugs but offer even better performance and longevity. The iridium center electrode is smaller, allowing for a more precise spark, improved combustion, and increased fuel efficiency. Iridium plugs are ideal for high-performance Mazda 3 models.

Double Platinum and Double Iridium Spark Plugs: These spark plugs have platinum or iridium on both the center and ground electrodes, providing enhanced durability and performance. They are suitable for Mazda 3 models with waste spark ignition systems.

Factors to Consider When Choosing Spark Plugs for Your Mazda 3

When selecting the best spark plugs for your Mazda 3, consider the following factors:


Check your Mazda 3 owner’s manual or consult a professional mechanic to determine the recommended spark plug type, size, and heat range for your specific model and engine.

Engine Performance:

High-performance engines may require spark plugs with a smaller center electrode, like iridium or double platinum plugs, for improved combustion and fuel efficiency.

Lifespan and Maintenance:

Iridium and platinum spark plugs have a longer lifespan than copper plugs, which means less frequent replacements and maintenance. If you prioritize longevity and low maintenance, opt for iridium or platinum plugs.


While copper spark plugs are the most affordable, they may not be the best choice for your Mazda 3 due to their shorter lifespan and lower performance. Consider investing in platinum or iridium spark plugs for better long-term value.

Top Spark Plug Brands for Mazda 3

Several reputable brands offer high-quality spark plugs suitable for Mazda 3 models. Some of the top options include:

NGK: NGK is a leading spark plug manufacturer known for its high-quality and reliable products. They offer a wide range of spark plugs suitable for various Mazda 3 models, including iridium and platinum options.

Denso: Denso is another popular spark plug brand that offers high-performance and long-lasting plugs. Their iridium and platinum spark plugs are suitable for Mazda 3 vehicles with high-performance engines.

Bosch: Bosch is a well-known automotive parts manufacturer that offers a range of spark plugs for Mazda 3 models. Their platinum and double platinum spark plugs provide improved performance and durability.

Autolite: Autolite offers affordable and reliable spark plugs, including platinum and iridium options, suitable for Mazda 3 models.

How to Replace Spark Plugs on Your Mazda 3

Replacing spark plugs on your Mazda 3 is a relatively simple process that you can do yourself or have a professional mechanic handle. Here are the basic steps:

  1. Consult your owner’s manual for the recommended spark plug replacement interval and the correct spark plug type, size, and heat range.
  2. Gather the necessary tools, including a spark plug socket, ratchet, extension, torque wrench, and a gap gauge.
  3. Ensure the engine is cool before beginning.
  4. Remove the ignition coils or spark plug wires to access the spark plugs.
  5. Use the spark plug socket and ratchet to remove the old spark plugs.
  6. Check the gap on the new spark plugs and adjust if necessary, according to your Mazda 3 owner’s manual specifications.
  7. Install the new spark plugs using the torque wrench to ensure proper tightness.
  8. Reattach the ignition coils or spark plug wires.
  9. Start the engine to ensure proper installation and performance.


Choosing the best spark plugs for your Mazda 3 is an essential step to ensure optimal engine performance, fuel efficiency, and longevity. With different types of spark plugs available in the market, it’s important to consider factors such as compatibility, engine performance, lifespan, maintenance, and budget when making your selection.

Reputable brands such as NGK, Denso, Bosch, and Autolite offer high-quality spark plugs suitable for Mazda 3 models. By understanding the importance of spark plugs and following the simple steps for replacement, you can maintain your Mazda 3’s performance and keep it running smoothly for years to come.

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