I think the part you are looking for is 51 719 810 530 shown in the picture below.
I don't believe the seal is available from BMW or reproduced. It is in a hidden location so I would look for a replacement from Steele rubber products here in the US.
When I had mine out I grabbed a picture of the profile, but did not take measurements. I suspect you can find a suitable replacement without too much trouble.
I don't believe the seal is available from BMW or reproduced. It is in a hidden location so I would look for a replacement from Steele rubber products here in the US.
When I had mine out I grabbed a picture of the profile, but did not take measurements. I suspect you can find a suitable replacement without too much trouble.