Engine Bay item HELP

[JKCupra]

I am looking to find out what an item is in the engine bay of my Leon Cupra R 54 plate, its in front of the expansion bottle and is black and has some pipes ect that go into the top of it.

What is it?

Does your one click like made when the engine is running?

 

[DPJ]

Charcoal filter for petrol fumes from the tank.

The clicking is a valve opening/closing to allow vac to suck the fumes into the intake manifold.

 

[meltonlad]

yep mine clicks away and i think its some kind of carbon filter.

 

[JKCupra]

Cheers guys just do not remeber hearing it before.

Thanks.