Question about 2006 BMW X5 4.4i

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BMW E53 2006 4.4 Brake Vacuum Pump falire make Sucking

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That sucking sound means that either the vacuum line is disconnected or the diaphragm is bad. Vacuum diaphragm in the vacuum booster being bad means you have to replace the sealed booster completely by removing the master cylinder from it, unbolt the booster from the firewall, and put a new one on. Then re-apply the master cylinder and connect the vacuum hose to it. You're done.

Posted on Nov 30, 2014

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