The clutch slave cylinder on my '09 Clubman S is leaking and I got a replacement from the dealer (21526770600). However, it does not seem to seal to the existing clutch line, and brake fluid streams out of the seal between the slave cylinder and the feed line. My old slave cylinder does not have a full part number stamped on it, but it does have "PA66-GF35".

Looking through realoem it appears that there are three generations of clutch slave (21526770600, 21526783622,21526798372), each of which appears to have it's own specific clutch line (21526770598, 21526863945, 21526783623). What is the difference between the 3 versions of clutch slave? Do they each need their specific clutch feed line to seal correct?

 

Did you get a new clutch line? What was the condition of the little oring in the end? Sounds like either the oring got damaged, is missing, or didn’t seat correctly.