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A Guide to Toyota Spark Plugs

Need to check or replace your spark plugs? Skip the shop and take the reins with this comprehensive guide on spark plugs!

What is a Spark Plug?

Toyota Spark Plugs OEM

First things first. Let’s talk about what spark plugs are. If you look inside one of your engine’s cylinders, you’ll see a tube-shaped electrical part. That’s the spark plug, and its purpose is to ignite the fuel mixture. The combustion that occurs is the source of power in an engine. This article goes into more detail about spark plugs and how they function with the rest of the parts involved in the internal combustion process.

How to Diagnose a Bad Spark Plug

The spark plugs in your Toyota will wear out over time, especially after you’ve been putting them to good use for over 40,000 miles. When one of your spark plugs goes bad, your engine performance suffers and your car eats up more gas than necessary. That’s why it’s always recommended to replace a bad spark plug as soon as possible. This DIY diagnostic guide is what you need to confirm that you’ve got a bad spark plug without having to bring your car to a shop.

OEM Vs. Aftermarket Spark Plugs

When it’s time to replace your spark plugs, you have two options:

  1. Buy aftermarket spark plugs from a local auto parts store
  2. Order genuine OEM spark plugs from a reputable OEM Toyota parts seller

One option is much better than the other, and it’s the latter (buying OEM replacement spark plugs). It’s because OEM spark plugs are much better than aftermarket spark plugs in terms of quality and fitment. Both of those factors determine a spark plug’s efficiency and life span. This article goes into more detail about why OEM spark plugs are always a wise investment.

How to Replace a Spark Plug in Your Toyota

The proper way to replace a spark plug in your Toyota is outlined in this step-by-step guide. The replacement process basically involves:

  • Removing the engine cover
  • Removing the ignition coil over the spark plug
  • Removing the spark plug and replacing any bad plugs

We hope this guide has helped you understand spark plugs better, as well as address a bad spark plug or two without needing to bring your car to a shop. Feel free to contact us if you have any question or if you need clarification on something in this guide.

Written by Jason Lancaster