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Thread: Brake fluid questions FAQ.

  1. #26
    Moderator S.F.W.'s Avatar
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    Default Re: Brake fluid questions FAQ.

    Quote Originally Posted by Noobster12 View Post
    hey! I need some advice/help...
    My sister owns a 2013 Mazda3 hatch and she told me that last time she got her $200 maintenance at Atrell Mazda, they told her that her brake fluids are darkening or turning black.. something like that.. I still have yet to take a look but is this a big worry or was the typical dealership brake fluid they put in dark colored?
    It's most likely bs dealership trying to sell a service to make money
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    Jr Member Noobster12's Avatar
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    Default Re: Brake fluid questions FAQ.

    Quote Originally Posted by S.F.W. View Post
    It's most likely bs dealership trying to sell a service to make money
    It was what I was thinking..
    If it is, is it easy to DIY bleeding the brake fluid?
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    Sr Member Flagrum_3's Avatar
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    Default Re: Brake fluid questions FAQ.

    Quote Originally Posted by Noobster12 View Post
    It was what I was thinking..
    If it is, is it easy to DIY bleeding the brake fluid?
    Word of advice; Do NOT even contemplate touching it, do not even take the cap off! There is a better chance you will contaminate the system if you do, just leave it alone...Especially if you have no clue what your doing...Or for peace of mind have the fluid 'properly' tested by a technician to be sure.

    The dealer was in all probability trying to upsell. Two or 3 year old vehicles should never have an issue with the brake fluid, unless there is a 'break' in the system, which IF the fluid was actually dirty, the dealer should have taken the precaution and inspected the full system as a consideration of safety to the client.

    Unless one tracks their car, or has changed out their calipers or lines for some reason or left the cap off the reservoir for an extended period, brake fluid should not need changing for many years. I'm nearing 9.5 years on the original fluid, tested it just this past spring, still clean and less then 1% water contamination.

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    Last edited by Flagrum_3; 11-29-2014 at 01:17 PM.

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    Default Re: Brake fluid questions FAQ.

    its recommanded to bleed your brake once a year

  5. #30
    Newbie c_del's Avatar
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    Default Re: Brake fluid questions FAQ.

    Quote Originally Posted by maxlau0303 View Post
    its recommanded to bleed your brake once a year

    I'm genuinely curious about this, by whom is it recommended? I have not generally heard this to be true...
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    Sr Member dentinger's Avatar
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    Default Re: Brake fluid questions FAQ.

    I flush the fluid on my truck every 40k.

    Your flex hoses/piston seals will e eventually absorb moisture, and the fluid the stays in the calipers gets heated/cooled frequently.

    Anyways, what happens, is the moisture reacts with the copper in the brake lines, turning the fluid brown, then green, and then eventually dark green/black.

    Take a look at your fluid, I normally only flush it if it's turning green, and I normally only recommend brake flushes when I'm doing brake work. Check your owners manual, and see when it's recommend to flush your fluid.
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