Sloshing noise coming from gas tank

My 2011 Subaru Outback 3.6R (bought in Feb ’11, and has 4k miles) has already had several issues in its short life. In just the past week I’ve noticed a sloshing noise coming from the gas tank. I first heard the noise when I was backing out of my driveway. I also notice the sloshing sound whenever I go over a bump or come to a quick stop. To determine where exactly the noise was coming from, I parked the car, turned off the engine and I pushed on the rear bumper to make the car move up and down. After doing this I determined that the noise is definitely coming from the gas tank.

Is it normal to hear gas sloshing around in the gas tank when driving? Could there be something wrong with the gas tank?

Well, it’s possible that an internal anti-slosh baffle has broken, but it’s more likely that you have water in the spare tire well.

Or in the doors. Or even the rocker panels.