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Subaru Check Level and Add Engine Coolant

This guide provides instructions on how to check and add engine coolant to a Subaru.

You can check Subaru coolant level by looking at the outside of the reservoir even if the engine is hot. If the level is the "LOW" mark, wait for the engine to cool down and follow the instructions below to add engine coolant. 

Subaru  Check Level and Add Engine Coolant
DIY COST $0-$20



What you will need

  • Subaru Engine Super Coolant SOA868V9270
    • Mixed 50% antifreeze, 50% distilled water
    • Use the coolant type noted in your owner's manual. 


  • Do not remove the coolant reservoir cap when the engine is running or hot.


  1. Allow the Subaru to cool down.  Opening the radiator or coolant reservoir cap when the Subaru engine is hot can cause serious injuries. add coolant subaru
  2. Pull the hood release under the dashboard.
  3. Locate the coolant reservoir and remove the cap.
  4. Add engine coolant to bring the level just below the Maximum mark.

That's it. Checking and adding coolant (antifreeze) to a Subaru is very easy. Make sure to allow the engine to cool down before you remove the radiator or coolant reservoir cap. 

What Kind of coolant does a Subaru take? 

Most Subaru vehicles use Genuine Subaru Super Engine Coolant SOA868V9270. Verify the correct engine coolant for your Subaru in the owner's manual. Don't use just plain water or unapproved antifreeze. 


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Tips & Warnings

  • When the engine is hot - Never open the radiator cap when the engine is hot. Wait to for the engine to cool down first. You may get seriously burned if the cap is opened when the engine is still hot or warm. The cooling system may be under pressure and may spray hot coolant if the cap is removed, causing burns or other injuries
  • When towing - Due to the added load of the trailer, your vehicle's engine may overheat on hot days (at temperatures over 85°F [30°C]) when driving up a long or steep grade. If the engine coolant temperature gauge indicates overheating, immediately turn off the air conditioning (if in use), pull your vehicle off the road, and stop in a safe spot.
  • Coolant level keeps dropping -If the coolant level drops within a short time after replenishing Visually check the radiator, hoses, engine coolant filler cap, radiator cap, drain plug and water pump for leaks.  If you cannot find a leak, have a mechanic test the cap and check for leaks in the cooling system. 
  • When adding coolant - The coolant is neither plain water nor straight antifreeze. The correct mixture of water and antifreeze must be used to provide proper lubrication, corrosion protection and cooling. Be sure to read the antifreeze or coolant label.

Safety Tips

Auto Repair Safety Notes