Part identification help please

[daveyonthemove]

I've recently had my injectors out of my car more times than I care to remember, and after I replaced them for the final time, I neglected to tighten it properly and the injector leaked exhaust gas and gunk from the side.
It also melted away the side of the plastic collar (?) on the injector, so it needs to be replaced but I can't find the correct name for it or a part number.
If anyone can identify the plastic part indicated by the red arrow, I would be very grateful.

Thanks, Dave.

[cheshired5]

Plastic collar....... New one on me.
Which D5 engine code?

[daveyonthemove]

Originally Posted by cheshired5

Plastic collar....... New one on me.
Which D5 engine code?

Sorry, should have mentioned that it's a 2.0D not a D5.
Injector part number: 9657144580

[5cilinder]

You better change the small metal ring that actualy seals the cilinder just above the injectortip

[daveyonthemove]

Originally Posted by 5cilinder

You better change the small metal ring that actualy seals the cilinder just above the injectortip

That's been done, all 4 copper seals have been replaced.
It's not leaking now as I tightened it up properly but the plastic item I'm trying to identify is damaged and I want to replace it and refit the injector for the final time.

[5cilinder]

[warlord0]

Not sure on these engines, but in the pug world we'd call them fire seals.