Quick answer
Mazda coolant: if your cap is marked FL22, Mazda recommends FL-22 coolant. MazdaShop sells it as a 55% pre-diluted coolant (part 0000-77-508F-20). Do not add water to it.
Mazda coolant at a glance
Genuine coolant
Part number
Colour
Spec codes to look for
Watch out
Matching products
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Confirm the code in your owner’s manual before buying.
On this page
What coolant does Mazda use?
- The 2022 CX-9 manual says: "If the FL22 mark is shown on or near the cooling system cap, use of FL-22 is recommended when replacing engine coolant. Using engine coolant other than FL-22 may cause serious damage to the engine and cooling system." [1]
- MazdaShop lists FL-22 (part 0000-77-508F-20) as a "Premium Pre-diluted Antifreeze and Engine Coolant (DO NOT ADD WATER)", "Mazda Warranty Approved", 55% concentration, freezing point -43 °C. [2]
How Mazda coolant changed over the years
Mazda marks the radiator cap with "FL22" when the car was filled with its green FL-22 coolant [1], and its manual warns more strongly than most against substitutes [3].
FL22-marked cars (2022 CX-9 example)
Mazda FL-22, premixed Not stated in manual
First at 120,000 mi / 10 years, then every 60,000 mi / 5 years [3]
Current parts listing
FL-22, 0000-77-508F-20 Not stated
55% concentration; "DO NOT ADD WATER" [2]
Mazda coolant chemistry
MazdaShop says FL-22 is pre-diluted at 55% and freezes at -43 °C [2]. Mazda does not publish its chemistry family in the sources we read.
Known Mazda coolant issues
- Mazda says using engine coolant other than FL-22 "may cause serious damage to the engine and cooling system" [3].
- FL-22 is already diluted, so adding water weakens it [2].
Genuine Mazda coolant we list
All genuine Mazda products and the details Mazda publishes are on the Mazda coolant brand page.
Aftermarket coolants listing a Mazda code
1 products in our data list one of these codes, per their maker:
Codes these products list (tap for every match)Mazda FL-22 1
Coolants whose maker mentions Mazda
2 more only mention Mazda in application text, which is weaker than a code:
Other car makes
Other car makes
A Mazda spec does not carry over to other brands. Also have a car from Subaru or Nissan? Look up Hyundai and Honda too, and read can you mix coolant? before sharing one bottle. All makes: coolant by car make.
Frequently asked questions
What does FL22 on my radiator cap mean?
It means Mazda recommends FL-22 coolant when you replace the coolant.
Can I add water to Mazda FL-22?
No. MazdaShop labels it "DO NOT ADD WATER".
When should Mazda FL-22 be changed?
The 2022 CX-9 manual says first at 120,000 miles or 10 years, then every 60,000 miles or 5 years.
Is Coolant.com affiliated with Mazda?
No. We are independent of Mazda.
Mazda coolant part numbers and spec codes
Part numbers here are copied from each genuine listing we cite; confirm them against your Mazda manual before ordering.
| Genuine product | Part no. | Code shown | Listing |
|---|---|---|---|
| Mazda Extended Life Coolant FL-22 | 0000-77-508F-20 (previous: 0000-88-AFFL-22) | Mazda FL-22 | mazdashopusa.com |
Repair manuals & accessories
Repair manual for your car
Haynes repair manual for Mazda
Step-by-step procedures, including draining, refilling and bleeding the cooling system. Manuals cover specific models and years: check the coverage on the cover before you buy.
Examples of the tool type, not a test or ranking by us. Check fit and instructions before you buy. See the full cooling system tools guide.
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How we source this page
- Facts come from manufacturer pages, datasheets, owner's manuals and standards bodies, linked under Sources.
- We do not test products, and no brand pays to be listed or ranked. Advertising and affiliate links are labelled and never change the data.
- Anything we could not find is marked "not published" rather than guessed. Spotted an error? Tell us.
Sources
Sources
- Mazda owner's manual (2022 CX-9): Inspecting Coolant Level
- MazdaShop: Coolant, Extended Life (FL-22)
- Mazda owner's manual (2022 CX-9): Scheduled Maintenance
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