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N52 Vacuum Pump

My 2007 E92 with the N52 engine started having a hard brake pedal. The brakes work just require a lot of effort. In try to diagnose the problem I connected a vacuum gauge to the vacuum pump to see if that was the culprit, reading was very low on the gauge but I cannot find a source for what is normal or expected value. Anyone have a suggestion.

thanks
Old 07-05-2018, 12:47 PM
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Dmitry at Pelican Parts's Avatar
 
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Any brake booster requires a minimum of 18” vacuum to operate efficiently. Anything less than that will contribute to the pedal being harder to push.
Old 07-05-2018, 01:02 PM
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Thanks for the fast response, is there a tech article on the website on how to replace? I can not find one.
Old 07-05-2018, 01:28 PM
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Quote:
Originally Posted by 2007328xi View Post
Thanks for the fast response, is there a tech article on the website on how to replace? I can not find one.
No problem, glad to help out. Unfortunately we do not have one on the brake booster for the E9x platform, I was able to find one for you though - link below. Please let us know if you have any other questions or if we can assist with any part needs in the future.

Hard Brake Pedal DIY (e9x) - vehicles up to 09/2007
Old 07-05-2018, 01:50 PM
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