This is a new o-ring (13.8x2.64mm) between the oil return (drain) hose and the distribution block on N63 and S63 V8 engines used on F10 550i/M5, G30 M550i, F90 M5, F06/F13 650i/M6, F02 750i, G12 750i, X5/X6 50i, and X5M/X6M. Gaskets can leak oil into the engine vee or onto the turbo itself.
This is a Genuine BMW oil line o-ring with a two year warranty. Buying a Genuine part will usually be more expensive than an OEM or aftermarket brand but you are assured that it meets BMW's designs for fitment, performance, and longevity. It will also be the very latest design, incorporating any updates or revisions that an aftermarket brand typically will ignore.
BMW Fitments:
5 Series
F10 / F11 (11-16) > 550i
F10 / F11 (11-16) > 550i xDrive
F10 / F11 (11-16) > M5 (2013-2016)
5 Series
F90 (2018+) > M5 (2018+)
5 Series
G30 (2017-2022) > M550i xDrive N63R (17-19)
G30 (2017-2022) > M550i xDrive N63T3 (2020+)
6 Series
F12 / F13 (12-18) > 650i
F12 / F13 (12-18) > 650i xDrive
F12 / F13 (12-18) > M6
7 Series
F01 / F02 (2009-2015) > 750Li
F01 / F02 (2009-2015) > 750Li xDrive
F01 / F02 (2009-2015) > 750i
7 Series
G12 (2016+) > 750i
G12 (2016+) > 750i xDrive
G14 / G15 (2019+) > M850i xDrive
X5 Series
E70 X5 (07-13) > X5 M
E70 X5 (07-13) > X5 xDrive50i
X5 Series
F15 X5 (2014-2018) > X5 xDrive50i
X5 Series
F85 X5 M (2015-2018) > X5 M
X5 Series
G05 X5 (2019+) > X5 xDrive50i
X6 Series
E71 X6 (2008-2014) > X6 M
E71 X6 (2008-2014) > X6 xDrive50i
X6 Series
F16 X6 (2015-2019) > X6 xDrive50i
X6 Series
F86 X6 M (2015-2019) > X6 M