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Kevin, BMW Mechanic
Category: BMW
Satisfied Customers: 1980
Experience:  Diagnostic technician
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The rear brakes on my 2004 BMW X5 were not operating at all.

Customer Question

The rear brakes on my 2004 BMW X5 were not operating at all.
JA: How many miles are on the car? Are these the orignial brakes?
Customer: When we pulled the hose and pumped the brakes we only got drips of fluid. We figured, bad master cylinder. We replaced the master cylinder and now the pedal is hard and immovable and we have no brakes at all.
JA: Are you fixing your X5 yourself? What have you tried so far?
Customer: I stopped at the master cylinder. I wanted to do no more harm. I don't understand what could make the pedal that hard and the brakes to completely stop working.
JA: Anything else you want the mechanic to know before I connect you?
Customer: No
Submitted: 9 months ago.
Category: BMW
Expert:  Kevin replied 9 months ago.

Hi im kevin the most likely cause of your issue is the abs pump .sometimes the electronic valves inside can stick preventing fluid from getting to brakes .with regards ***** ***** pedal this is likely the same issue and the brakes need to be bled electronically to force the valves inside pump to open