leak

Hi, going out to my car this morning I noticed a large pool of dark looking fluid just in front of the rear drivers side wheel, does anyone have any idea what this might be from here?? Two pictures attached Thanks

Hey guys, new the forum! I've recently bought a 2005 Corsa C 1.8 Sri that suffers from wet footwells when it rains! This only occurs on the drivers side so I believe I have the infamous problem where the gasket around the brake servo becomes brittle and no longer prevents the ingress of...