Bumper Buffers - Renault Part Number

There are two little buffers that stop the tailgate hitting the rear bumper when it's closed. They seem to be a two-part assembly one part being attached to the rear bumper and then the buffer fitting into it.

Here's a few photos:

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You can see in the second photo that I have one missing and I'd like to replace it, I've spoken to Renault and they've said to bring the part in, but that means I've got to take off and re-fit the bumper twice which is a bit of a pain.

Does anyone know what the part number is so I can just order it?

Cheers,

Tom.

P.S. The car's a lot cleaner now :smile:
 
One of the previous owners has had the rear bumper re-sprayed (badly) and I'm having it re-done next week. I just wanted to fill the hole.