Is it normal to hear the gas tank on cold starts?
 

I recently got my car back from the dealer, the rear bumper and rebar were replaced
it was a minor accident, paint just got scratched abit

but now I got the car back and on cold starts I can hear what sounds like bubbles and when I start to drive I can hear water sloshing around.

I think this is the gas tank? The car is a 2010 I got recently so I never noticed it before, but is it normal to hear the gas tank pressurize like this at start?
Anything else come to mind? is there a rear wiper spray canister? I also had the oil changed, this is not related to that?

if its coming from back then yes its the gas tank.
if its coming from the passenger side gloves its the coolant.
both are normal at least my R3 does both.