09 brake fluid reservoir - BMW Luxury Touring Community
 
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post #1 of 6 Old Nov 19th, 2009, 1:15 pm Thread Starter
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09 brake fluid reservoir

The brake fluid reservoir to the abs system is so small! Am planning to flush my brakes, I would have to fill it continuously.I know they sell something to keep it filled but why such a small reservoir? Am I missing something ?I have 16000 miles and always ride two up . Did my own 12000 because not making as much money ,now Iam going to tackle a brake flush.
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post #2 of 6 Old Nov 19th, 2009, 3:15 pm
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Re: 09 brake fluid reservoir

That's a bit too soon to flush your brakes.

there are two reservoirs, on the handlebars and under the passanger seat. the one you care about is under the passanger seat (there are actually 2 there for front/back).

I don't think they are any smaller than other reservoir on other bikes.

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post #3 of 6 Old Nov 19th, 2009, 4:29 pm Thread Starter
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Re: 09 brake fluid reservoir

Thanks for your reply Caveno,but that's what Iam looking at the reservoir under the seat, holds hardly any fluid and just one singular.I've seen post about what you're talking about two reservoir but all I see is this little thing.The reason I thought it might need to be flushed,because the fluid in the front brake reservoir was dirty looking, and had a brake failuare alarm go off when I went to start the bike.Turn the bike off and back on and all was fine.This was about after 15 min. At a rest stop
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post #4 of 6 Old Nov 19th, 2009, 4:43 pm
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Re: 09 brake fluid reservoir

I believe you also have a resevoir on the right side behind the rear foot peg.

You'll have to keep filling and refilling while you let the ABS pump do the work.

There is an excellent write up with the "05 adendum" for flushing the brakes. i used it on my 05 with no problems.

Low resevoir will make the light flash, any chance your pads are already worn out? That is the easiest way to lower the fluid level.

PM me if you want me to e-mail the procedure, but, it is on the site. I've got a copy somewhere on my hard drive.

Good Luck,

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post #5 of 6 Old Nov 19th, 2009, 8:45 pm
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Re: 09 brake fluid reservoir

Actooly there are FOUR reservoirs. One on the handle bar and the little one under the seat both are for the control circuits and that fluid goes no farther than the ABS unit. That is why it is so small. The two wheel circuit reservoirs are built into the ABS unit and that fluid goes from the ABS unit to the the respective calipers (rectangular black item in the photo).

You need a funnel and a stopper to flush the wheel circuits since the reservoirs are black plastic and you cannot see the level. Beemer Boneyard sells a nice set up that screws right into the reservoir cap holes. Or you can make your own. Look in the files section under technical for a good explanation of the flush process but it was written by Mark Nebelett for the early Integral brakes that had the reservoirs for the wheel circuits back where your little rear one is. Then look at the addendum for 05's for a bit more info. I agree that it is probably too early to flush unless you have had her on the road for a year on the wheel circuits and two years on the control.

I get black fluid each year out of the wheel circuits but the control circuits I am leaving for every three now as they are seldom contaminated. I have seen some that were really bad so you have to do it once to see what effect your environment has on it and adjust intervals accordingly.
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Last edited by jzeiler; Nov 19th, 2009 at 8:54 pm.
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post #6 of 6 Old Nov 21st, 2009, 6:25 am
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Re: 09 brake fluid reservoir

It's never too early to flush! especially if the fluid you can see is discolored, you do not want to cause a failure here because you did not want to spend a couple of hours and 20 bucks on fluid, that can be a very costly mistake!
Mine is an ealier model, the 05 and later have a reservoir on the pump located under the seat on the left side of the bike but it is fed from the other reservoirs, be sure to flush the contorl circuits as well as the wheel circuits until you get clear clean fluid through them, remember that this fluid can damage the paint so be careful to keep it from getting on painted surfaces and if a drop does get on anything wash and flush that area immediately.
There are good write ups on how to accomplish this in the tech section as well as in some of the posts, a search should turn up more information than you can use.


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