Can you analyse and identify the source of this leak in the BMW E90 based on a picture?

[dave783]

Greetings, gentlemen. Based only on these pictures, I would appreciate it if someone could provide a diagnosis or provide insight into the reason of this little leak, as well as the likelihood of it being a cost-effective and straightforward repair. Just to provide some background, this is in reference to a BMW E90 330i. Thank you!

[ByteStorm]

The first photo depicts a sensor that may be experiencing a little leakage. Not a significant task.
I am uncertain about the objects I am seeing, save for the undertray seen in the second photo.

[dave783]

Thank you, ByteStorm. Hopefully, it is a straightforward task.

[Paqngo]

The oil pressure switch seems to have a little leakage, but because the surrounding aluminium housing is dry, I doubt that the small amount of oil found on the bottom tray is caused by the switch.
It is not feasible to evaluate the issue only from a photo. The under tray has to be removed in order to properly assess the problem.

[dave783]

Thank you for responding. Hopefully, the issue will be resolved easily.

[ByteStorm]

Upon closer inspection, I have seen the presence of oil on the undertray. Initially, I mistakenly saw it as a gap in the moulding. I apologise for the confusion.

[WordSmith]

Perhaps inspecting the gasket of the oil filter housing?

[dave783]

Thank you for the responses. Just to clarify, I do not currently own the automobile, thus I am unable to do any inquiry at the moment. I was seeking reassurance that it did not seem unattractive. Clearly, I will never have a definitive understanding unless I am able to thoroughly examine the situation.

[WordSmith]

These kind of leakage are not a major cause for worry.
You should be worried about rust and fissures.

[dave783]

Thank you. I have several photographs showcasing the bodywork, which is free from any corrosion. It is an exceptionally clean and well-maintained specimen.