Mr Tidy said:You're not alone:- https://z4-forum.com/forum/viewtopic.php?t=147724
If it is all still complete you might be able to seal it by replacing the rubber O rings.
SimonAW said:I had this problem and I bought several used washer units and all of them leaked, in the end I bought a new one from my local BMW dealer and it is sorted.. so all i would say is unless you get them VERY cheap second hand..just donlt bother.. get a new one.
Just my opinion.
thespannerman said:As mine seems to be leaking around a joint in the body of the washer towards the bottom, are we saying it’s possible to replace seals/O rings to fix this,
(For now I have just blocked off the feed pipe)
Cheers
Al