How to Change Ignition Coils on a Mazda

How to Change Ignition Coils on a Mazda

DIY Cost: $50-$100
Est. Time: 30 min
Difficulty: Easy

This guide provides instructions on how to replace the ignition coil on Mazda. These guidelines were written for Mazda vehicles with four-cylinder engines and apply primarily to Mazda 3, 5, 6, CX5 CX7 CX9 with the inline-four engine. 



Follow these instructions to replace the ignition coil on four-cylinder Mazda vehicles.

  1. Park your Mazda on level ground. Allow the engine to cool down for at least fifteen minutes.
  3. Pull the hood release under the dashboard and open the hood.
  5. Locate the battery in the engine bay. Disconnect the negative battery terminal, which should be marked with (-) and has a black cable. 
  7. Remove the engine cover. The engine cover is held in place with four tabs and no screws. You simply grab it on both sides and lift it.DIY instructions on how to change Mazda spark plugs
  8. Unplug the electrical connector from the ignition coil. Press on the small tab, then pull. Do this for all four coils.
  9. Remove the 10mm bolts that secure the coil in place. Mazda ignition coil replacement diy
  10. Remove ignition coils from the engine. If the coils don't come out easily, try twisting and pulling them at the same time. 5 ignition coil replacement instructions 2010 2011 2012 2013 2014 2015 2016 2017 2018
  11. Install new Mazda ignition coils in reverse order.
  12. Reinstall the engine cover by aligning the four tabs and pressing down on the engine cover. Connect the battery. 


Do not switch the ignition coil connectors. 

Your Mazda has four ignition coils. One per spark plug. Replacing ignition coils on the 4-cylinder Mazda engine is a very easy procedure.

Frequently Asked Questions

How much does it cost to change Mazda ignition coils?

On September 18, 2017, we called a few Mazda dealers in New Jersey to get a quote to replace ignition coils on a 2014 Mazda 3.

Here is the quote that we received.

Parts (Four Coils) = 4x$106=$424 Labor to change all four coils: $195 The average cost to change the ignition coil at Mazda dealerships is $600-$650 USD. The cost to replace the ignition coils yourself is between $30 and $100.

Can I change only one ignition coil on a Mazda?

Yes, if only one of the ignition coils has failed, you can replace only one coil. Most mechanics and dealerships don't recommend replacing only one coil for a couple of reasons. If one failed, another one might fail soon. Also, to avoid any performance issues, it is recommended to change all four. If you are on a tight budget, at a minimum, replace the one bad coil.

How often should I change the ignition coil on a Mazda?

It is not necessary to change ignition coils on a Mazda unless at least one of them fails. Ignition coils can last up to 200,000 miles. In a few cases, we have seen ignition coils fail as early as 60,000 miles.


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