Hi Guys,

I've always though my L322 smelt of diesel fumes a bit, but when removing the engine cover to undo the drivers side air intake pipe to change the air cleaner, I was confronted with this.

Is it safe to say that this is and a new one is needed? I don't get any RP issues, just some smells, and (to me) underwhelming performance. I mean could it be messy oil changes, to have all that mess pretty much all around the plenum?

Click image to enlarge

New part £500. You could try repairing it with some pop rivets along the seam ( mine has this and isn’t leaking) 2012 TDV8 Vogue (L322)

Ah is that confirming it fubard then? Time to see if the place I bought it from is feeling helpful, otherwise is time. Encourage alternative fuels, use all the petrol!
2012 Range Rover Vogue 4.4 TDV8
2006 Mercedes GL420 CDI
2006 Porsche Cayenne Turbo S
2006 Jeep Commander 3.0 CDI with GDE HOT Tune
1997 Nissan Patrol 4.2 GRSE
1995 Vauxhall Monterey Diamond 3.2 v6
1994 Range Rover 4.2 LSE Beluga Black, Softdash, Brooklands Body Kit - Loved it!
1993 Range Rover 4.2 LSE ended up converted to 300tdi

https://www.ebay.co.uk/itm/RANGE-ROVER-4-4...635-2958-0

Maltings have them in stock

These look to be a pattern part with throttle body
https://tpuk.net/range-rover-4-4-tdv8-air-...sport.html

Not is stock at the last link ( otherwise I'd be tempted just to avoid cleaning mine) 2012 TDV8 Vogue (L322)

In stock on there eBay listing

https://www.ebay.co.uk/itm/RANGE-ROVER-4-4...635-2958-0

Says 'this item is out of stock' on the yellow header. 2012 TDV8 Vogue (L322)

"Ah is that confirming it fubard then? Time to see if the place I bought it from is feeling helpful, otherwise is Big Cry time."
Have you just bought this recently?
If so that amount of accumulated muck is all the evidence you need that it was sold to you with an existing fault which will help your case.

Yup only had it a couple of months. The dealer has accepted responsibility , so looks like I can save my pennies for now. Encourage alternative fuels, use all the petrol!
2012 Range Rover Vogue 4.4 TDV8
2006 Mercedes GL420 CDI
2006 Porsche Cayenne Turbo S
2006 Jeep Commander 3.0 CDI with GDE HOT Tune
1997 Nissan Patrol 4.2 GRSE
1995 Vauxhall Monterey Diamond 3.2 v6
1994 Range Rover 4.2 LSE Beluga Black, Softdash, Brooklands Body Kit - Loved it!
1993 Range Rover 4.2 LSE ended up converted to 300tdi

The performance should definitely not be underwhelming.

Hopefully you will get it sorted and notice a change.

 2011 Range Rover Vogue SE 4.4 TDV8

Previous cars :
2003 Range Rover Vogue TD6
1999 Discovery Td5 ES
1995 BMW M5 3.8 6 speed
1992 Range Rover 3.9 Efi Vogue
1992 BMW M5 3.8
1988 BMW 735i SE
1989 Ford Sierra XR4x4 2.9i
1981 Ford Fiesta Supersport

I managed to extend the life of mine with epoxy for a good few months but , with hindsight, I should have renewed it ages back. A few days back got one from Maltimgs and sorted it. Result = soot levels low, better mpg, smooth power yield and peace of mind. The gunge in the old one and the throttle body was staggering . 60plus k miles and no supermarket diesel used. I reckon a good 5% plenum volume occupied by gunge. ----------------
2010 RR tdv8 3.6 ( gone but not forgotten ...)
2012 RR tdv8 4.4
2004 RR 4.4 V8 (M62) -gone but not forgotten (sob)
1998 P38 RR - least said the better
2009 BMW 7 Series 3.0d
Various motor cycles - BMW GS
1998 Jag XKr 4.0 V8

Buildup of black gunk seems to be a normal condition for these intakes even when working correctly. Even if you clean or replace the plenum to remove this build-up there will be still deposits within the manifolds and around the intake valves which you can't get to without a significant teardown of components. It's a good idea to regularly clean the MAP sensor as when this gets blocked it definitely caused a bit of hesitancy on low end pickup and maybe also remove the throttle body to ( carefully) clean this and the EGR pipe that sticks into the Plenum. Also just how long before it gets a new coat of gunk when you have cleaned it. I was watching my EGR valve position and operation via the GAP IID tool and cruising on the M-way it's open most of the time and only closes on fairly hard acceleration and overrun. 2012 TDV8 Vogue (L322)

👍🏼 Thanks for info ----------------
2010 RR tdv8 3.6 ( gone but not forgotten ...)
2012 RR tdv8 4.4
2004 RR 4.4 V8 (M62) -gone but not forgotten (sob)
1998 P38 RR - least said the better
2009 BMW 7 Series 3.0d
Various motor cycles - BMW GS
1998 Jag XKr 4.0 V8

This seems to be working on mine