Help me, problem with breaking... - BMW Forum

warrior spirit · 03-09-2009, 12:18 PM

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?

witeshark · 03-09-2009, 12:21 PM

It would be a good idea to have the brakes checked by a good shop. One possibility is a need for new brake fluid.

warrior spirit · 03-09-2009, 12:27 PM

thnx my friend for your quick help, i'll try to change fluid....

marti5 · 03-09-2009, 12:33 PM

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 !!!!

warrior spirit · 03-09-2009, 12:47 PM

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

marti5 · 03-09-2009, 01:01 PM

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.

warrior spirit · 03-10-2009, 06:05 AM

Dear friends...

is there any advice about choosing the breaks fluid???

nukeduster · 03-10-2009, 07:23 AM

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.

warrior spirit · 03-10-2009, 12:00 PM

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

Numark318i · 03-10-2009, 12:31 PM

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

warrior spirit · 03-12-2009, 06:11 AM

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