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Old 11-01-2018, 02:04 PM
Westlotorn Westlotorn is offline
Join Date: Nov 2016
Location: Folsom CA
Posts: 64
Westlotorn is on a distinguished road
The vacuum pump has two seals, an inner and an outer that can leak, both are O'Rings. The part numbers are shown in this forum but I don't have them handy. One is available at the BMW dealer but the other is not. You can get both from one of the aftermarket BMW parts houses, I found the part numbers on this forum when I did it. I tried an aftermarket oring from Napa first, it worked but was a little too large. The BMW house had a better set of O'Rings.
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