There was some type of push-lock fitting where the nylon brake booster vacuum line attached to the lower throttle body elbow. It disintegrated. Does anyone have any idea on how to get this fitting or how to get this line attached in a leak free way. Highlighted in attached pdf is the part shown, with no call out. Suspecting this three-cent piece is sold with the lower throttle body, or maybe the nylon hose.

 

The PDF attached appears to be a rear mounted throttle body from the x308 series. This forum section is for the x350.

 

Nope, its not. This is x350 all day -2004 XJR. .pdf indicates as such at the top.

 

So, there are two ways you can go...

One, purchase a replacement fitting, which includes the brass housing, o ring and plastic collar. If you go this route you want to change out the o ring.

Extremely hard to do in situ, even with the Throttle Body out of the way. The proper way is to remove the SC then plenum.

I did it eventually with my inspection camera, wires, pics, etc. A royal PITA!!!

The second option (which I plan on doing) is get a 90 degree brass fitting. (Posts here on forum) create threads in the SC plenum, then attach the rubber hose. It's a better solution.

 

I fought this in detail on my old 2005 S Type R.

Here is my thread that includes the cheap and easy brass fitting fix plus the explanation of the factory over complicated rotating fitting. I did the brass fitting fix and never had a bit of trouble afterwards.
Vacuum Leak at PB Fitting
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This is the way I'm going once I have to dive into replace that dreaded hose under the SC