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Thread: 2016 CX-9 Automatic Transmission Fliud Replace?

  1. #1
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    2016 Mazda CX-9 Grand Touring AWD

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    2016 CX-9 Automatic Transmission Fliud Replace?

    Coming up on 30,000 miles on my 2016 CX-9. In the manual and on the Mazda website states that the automatic transmission fluid does not need to be replaced and that it is a sealed system. Anyone have any experience in taking your 2016+ CX-9 to the dealer for ATF drain and fill?

  2. #2
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    Mazda CX-9 Grand Touring 2016

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    Modern fluids are designed for a long life, certainly much longer than the fluids in the past. Unless you work it very hard (max loads, maybe towing, fast steep hills in hot weather) I'd plan on a 100,000 mile full replacement plan. On the other hand, a partial replacement with a drain & refill every 30k is never a bad idea. When they say sealed, it usually means no dipstick. It always needs a vent to allow air to move in and out as the fluid and metal heats and expands and cools and contracts in normal usage.

    If you really want to do something nice for your transmission, put a filter on it in the hot oil line leading to the cooler.*
    https://magnefinefilters.com/main.sc

    *We're often told to use these in the cool line exiting the cooler. Filters are very often used after a transmission fails. Lots of metallic bits are carried to the cooler and held there. The filter after the cooler, in this case, catches these bits before the return to the new transmission. On a transmission that hasn't yet failed putting the filter in the hot line lets it clean the hot, thin oil that filters better.

  3. #3
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    2010 Mazda 5

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    My brother has a Scion FRS. His automatic transmission is vacuum sealed. Not only can you not check the fluid, you have to have special equipment to service it.
    2018 CX-9 Grand Touring
    2010 Mazda5 Sport Manual
    2005 Ford Freestyle Limited AWD
    2000 Ford Excursion Limited 4WD 7.3 PSD
    1991 Miata

  4. #4
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    2016 Mazda CX-9 Grand Touring AWD

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    I had the dealer perform the transmission drain and fill on my 2016 CX-9 this weekend. Cost was $120 (4 quarts of ATF for $68.48 and $51.52 in labor).

  5. #5
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    Mazda CX-9 Signature

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    Good to know the pricing but may I ask why? In your original post you said the manual didn't call for any tranny service yet you went ahead with it. Any specific reason behind this at 30k?

  6. #6
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    2016 CX-9 Signature/2015 CX-5 Touring/2013 MX-5 GT PRHT

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    Quote Originally Posted by Silly Wabbit View Post
    Good to know the pricing but may I ask why? In your original post you said the manual didn't call for any tranny service yet you went ahead with it. Any specific reason behind this at 30k?
    Because of this -> https://www.youtube.com/watch?v=o690DovjDAc

    I am going to do this same thing at 60k. 30k just seems a bit early. In my opinion, Mazda's for life fluid means until warranty expires.

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