Common issue with oilheads – 850/1100/1150, the engine oil filler cap starts leaking. Just changing the top o-ring does not help, you have to also change the one between the cap recess and the aluminum valve cover.

Get both from here and save a trip to the store for almost free! Only available if you make some other purchase from the webstore.

BMW part numbers: 11 14 1 340 901, 11 14 1 340 902 , 11141340901, 11141340902

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