Unknown leak

[Benjy58]

Gentlemen, I have this problem. When I park the car overnight I have a big puddle of antifreeze under the drivers side front, I have replaced the expansion tank, hoses, radiator, radiator cap and temperature sensor. It's driving me crazy and any help would be appreciated.

[MauiM3Mania]

Moved from General BMW Discussion sub-forum.

[charter21p5]

Get a coolant leak pressure detector

[por911]

Remove the belly pans and have a look below with a long flexible led light. See if you can trace it up. These cars are aging and the plastic connections and hoses are giving issue. Hopefully, you used factory parts. I find after market stuff is so-so, depending on the brand and part.
Regards

[Benjy58]

Remove the belly pans and have a look below with a long flexible led light. See if you can trace it up. These cars are aging and the plastic connections and hoses are giving issue. Hopefully, you used factory parts. I find after market stuff is so-so, depending on the brand and part.
Regards

I have used all BMW parts.

[Benjy58]

I have used all BMW parts, Only thing I can think of is a no good pressure cap, but is one I replaced.