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A BMW shop diagnosed a oil leak at the break booster pump seals on my car. I am researching an can not find the difference between the vacuum pump and break booster. I even found seals for the "break booster vacuum pump". Are they one unit?
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Don, check with your dealer first about the recall "MODEL YEAR 2002-2008 7-SERIES VEHICLES. A CHECK VALVE OF THE BRAKE VACUUM PUMP MAY LEAK A SMALL AMOUNT OF LUBRICATING OIL. OVER TIME THIS COULD RESULT IN CONTAMINATION OF THE BRAKE BOOSTER.
Defect Consequence:
POWER ASSIST BRAKING PERFORMANCE COULD BE ADVERSELY AFFECTED. IN EXTREME CASES THERE COULD BE A COMPLETE LOSS OF POWER ASSIST BRAKING. AN UNEXPECTED REDUCTION OR LOSS IN POWER BRAKING ASSIST MAY INCREASE THE RISK OF A CRASH.
Remedy:
BMW WILL NOTIFY OWNERS AND DEALERS WILL REPAIR THE VEHICLES FREE OF CHARGE. THE SAFETY RECALL BEGAN ON NOVEMBER 24, 2010. OWNERS MAY CONTACT BMW AT 1-800-525-7417.
Notes: BMW OF NORTH AMERICA, LLC, "
The vacuum pump is before the brake booster. It will create the vacuum needed for your booster. Hope this helps, good luck.
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The N62 engine in your car does not produce any manifold vacuum. The brake booster operates off manifold vacuum. To remedy this the bank 1 (right side of the engine) has en externally mounted vacuum pump that is driven by the exhaust camshaft. The vacuum pump tends to leak oil from the front cover and BMW does not offer a seal for the repair. An oil filter o-ring from a 2007 3 series will work on the vacuum pump on your car. Any competent independent repair shop should be able to complete this for a fraction of the cost of a replacement pump.
The entire repair at my shop is typically in the $250 range.
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@dan what is this sourcery? And do you have more? I bought my 08 7 series in 2011, and a mid YouTube slim socket user. Haven’t had to eat shop crow yet, and maybe a bit of your magnificent knowledge (3series o ring compatibility) can keep it that way.
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