Learn to check the engine coolant level and add antifreeze to a Mazda vehicle. 

The pictures used in this guide are from a 2015 Mazda 5, but these instructions apply to Mazda 3, 5, 6, CX5, CX7, CX3, CX9, and other models.

What you will need

  • Mazda Engine Coolant
    • 50% distilled water
    • 50% antifreeze


  1. Park the Mazda and allow the engine to cool down for at least thirty minutes.check engine coolant level add coolant mazda
  2. Locate the hood release underneath the dashboard of your Mazda. Pull the lever until you hear the Mazda hood pop open. Next, you need to release the hood safety latch at the front of your hood.
  3. Next, locate the coolant reservoir (tank) on your Mazda. This is where you add an engine coolant reservoir on a Mazda. The coolant reservoir is typically located on the passenger side of the engine.
  4. Look at the coolant reservoir tank and note the low and high marks. If the level is below the minimum mark, you will need to add coolant, or your Mazda may overheat and blow a head gasket. check low coolant level 2010-2018 Mazda 5 2015, 2016, 2017, 2018 Mazda 5 Mazda 3 5 6 cx5 cx7 cx9
  5. Remove the coolant reservoir cap very slowly. Add engine coolant antifreeze Mazda 5 2010 2011 2012 2013 2014 2015 2016 2017 2018 2015, 2016, 2017, 2018 Mazda 5 Mazda 3 5 6 cx5 cx7 cx9
  6. Add engine coolant/antifreeze. Only add the coolant type recommended by Mazda.

Adding engine coolant to a Mazda is easy. Only add the coolant type recommended by Mazda. If the light for the low engine coolant level turns on, check the coolant level when the engine is cold.

Do not open the radiator cap if your Mazda engine is hot.

Instead, add coolant to the coolant reservoir. If the light on your Mazda dashboard has turned on, indicating a low coolant level, you first need to check the coolant level. Do not continue to operate your Mazda 5 if the engine is overheating or the high engine temperature light comes on.

We hope you find the Mazda Check Coolant Level & Add Antifreeze guide helpful. Check these troubleshooting and repair guides for more help on your Mazda.

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