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5-Series (E12,E28, E34, E39, E60) Chat relating to the BMW 5-Series of all generations. Specific models include: BMW 518, BMW 520, BMW 520i, BMW 530i, BMW 528i, BMW 530i, BMW 518i, BMW 524d, BMW 525i, BMW 525e, BMW 528e, BMW 540i, BMW 535i, BMW 520d, BMW 525td, BMW 525d, BMW 530d, BMW 525i/xi, BMW 530i/xi. (BMW 5-Series Forum)

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Old 03-09-2009, 12:18 PM   #1 (permalink)
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NWS Help me, problem with breaking...


Dear friends, i'm new here and i hope that u can help me....

i have E39 520i and i noticed that the break pedal becomes harder when breaking and stop distance longer than before...

can anyone help me here with this problem? and is it dangerous one?
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Old 03-09-2009, 12:21 PM   #2 (permalink)
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It would be a good idea to have the brakes checked by a good shop. One possibility is a need for new brake fluid.
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Old 03-09-2009, 12:27 PM   #3 (permalink)
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thnx my friend for your quick help, i'll try to change fluid....
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Old 03-09-2009, 12:33 PM   #4 (permalink)
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Sounds to me like the master cylinder is on its way out, so you will need new fluid aswell.

Yes it is dangerous as the pedal may go hard and you have no brakes !!!!!Beware !!!!
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Old 03-09-2009, 12:47 PM   #5 (permalink)
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thnx friend for your advice, is it means that i need to change the master cylinder or i must try fluid change first??

u r wonderfull people here , thnx again
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Old 03-09-2009, 01:01 PM   #6 (permalink)
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Hi, Old fluid would mean you having to pump the pedal to get pressure rather than the pedal going hard, so that leaves the master cylinder, the other reason for the pedal to go rock hard is air in the system, which is not your problem as you have'nt changed any of the braking components on the fluid side of the system.

You can of course go with a fluid change first thats up to you, but being an E39 with service its been changed many times before, ive run/had cars with fluid in and working fine over 20 years old.
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Old 03-10-2009, 06:05 AM   #7 (permalink)
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Dear friends...

is there any advice about choosing the breaks fluid???
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Old 03-10-2009, 07:23 AM   #8 (permalink)
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dont mess around with brakes guessing and asking internet shade tree mechanics... you'll get yourself or someone else killed. take the car into a qualified mechanic. today.
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Old 03-10-2009, 12:00 PM   #9 (permalink)
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i changed the fluid and will test it, but i noticed improvement.

thnx Mr. Nukeduster for your advice


wnderfull guyes here

wish u all luck
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Old 03-10-2009, 12:31 PM   #10 (permalink)
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Make sure you get approved fluid for the car.

and unless you are 100% confident in your work, make sure you have the car double checked by a mechanic. It never hurts to get a second opinion
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Old 03-12-2009, 06:11 AM   #11 (permalink)
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Thumbs up

Dear all friends,

i changed the fluid with original BMW fluid and everything going fine till now, i tried to heat up my breaks and they were fine.

wish me luck

thnx again
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