(Quad exhaust)Pump in rear bumper of z4 coupe ? Please help :)

[greyz4coupe]

Hello all I’m trying to find out what the pump is in the back right of the bumper
As I dropped it off to get quad exhausts this morning and they said the only way would be to somehow move the pump (which I have no idea what it is)
It was very disappointing as I waiting 3 months for this appointment

Please say there is a way

 

[patriot66]

In that location it can only be the fuel tank EVAP charcoal canister and pump. It can possibly be relocated elsewhere and the plastic breather pipes cut and rejoined/re-routed with a bit of jiggery-pokery....fingers crossed !