identify part under passenger seat

[JamesnAl]

Ive got a coolant leak. This morning there is a wet patch under the van that comes from under the passenger seat area, just beyond the drip trays. There is a black plastic round object here with rubber tubes attached. There is FS5R 4KD enscribed. Can anyone tell me what this is? Also does anyone have photos of under the seats which identify various parts? (should have mentioned mine is a 2001> 2.0 petrol auto (LPG conversion)). Thankyou and Hi!

[g8dhe]

The mech. diagrams are here it sounds like it might be the "Vapour Cannister" # F28613970A which handles fuel and emissions vapours.
http://www.lushprojects.com/bongopartsm ... no=.html#9 is the relevant page if it is.

[JamesnAl]

Much obliged