I've just got a new air filter and fuel filter to change over the weekend, I was reading a post on another forum that said I'm better off changing some breather too if I'm doing the air filter?, could anyone shed any light on this? Would be handy to know what the part is called and where it's located so I can order it and replace it!!.

http://www.advancedfactors.co.uk/llj500010...1747-p.asp

And a little snap shot off that Russian website for it's location...

 Paul Redding
+44 (0)23 8052 2760
paul@advancedfactors.co.uk

When you get the air filter housing removed, the crank case breather filter is located at the back of the rocker cover on the drivers side of the engine (assuming right hand drive car). I found it made the job easier if you unbolt the injector wiring harness and unplug it from the rear most 4 injectors. This gives clearance and visibility to get at the Allen headed bolts holding the filter housing on. It's pretty easy to change, putting the air filter housing back on however, is a bit fiddly in my experience. Patience and getting the back two bolts started first is the key to success  Should've been old enough to know better...doh!
Current 2010 5.0 SC Autobiography
Previous 2006 TD6 Vogue SE
Previous 1998 P38 4.6 Vogue Autobiography 50 (No 10)

Replace Crank breather with part # 11127799367 ( oil separator). Wont need changing again

Also please update your car thingy under your name

Gary