I noticed an open ended black rubber tube in the engine bay. (similar in diameter to fuel pipe etc.) I followed it down and it disappears somewhere underneath the oil filter area, so not sure where it actually goes. Any idea what it is for (breather? drain tube?). Should it be open ended or attached to something? (Red arrow on photo shows where it goes)

Click image to enlarge

There is a vent from the washer bottle down there somewhere, the other end should be clipped to the top of the washer bottle neck... Pete
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2014 L405 Autobiography SDV8 4.4 Loire Blue Ebony interior
2011 L322 Vogue SE 4.4 TDV8 Baltic Blue. Sold
2012 L322 Autobiography 5.0 Supercharged Ipanema Sand Sold
2002 L322 Vogue 4.4 V8 Epson Green (Fatty Offroader) Sold
-Click for Project Fatty off roader-

Nope, that's not it. Thanks for the suggestion though. No longer FF owner but still interested. Present car Jaguar XE
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Previous car Td6 SE
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Previous LR- Disco 300TDi Auto

Is it the fuel burning heater exhaust? My Previous RR's!
2018 P400e Autobiography
2008 TDV8 Vogue
2006 TD6 Vogue
2007 TDV8 Vogue
2007 RRS (I know, it doesn't count!)
2005 4.4 Vogue on LPG
2005 TD6 Vogue
2003 4.4 Vogue
2001 4.6 HSE
2000 2.5 DHSE
1999 4.6 HSE
1997 4.6 HSE on LPG
1995 2.5 DSE
1989 3.9 EFI classic
1988 3.5 EFI classic

^ nope that comes out under the car

Could be a breather for the diffs or gearbox. There is nothing that can't be fixed with a hammer😜😜
FFRR 4.4 SDV8 Autobiography Santorini Black.
KIA E-Niro 4+
2021 Discovery 5 D300 MHEV commercial

Hiya think it's the pressure blow off for the turbo . Have one one mine just the same , I'm sure I read on the forum months ago that was what it was - can't find the post now though! !! I thought something was missing as well

Cheers RP