Leaky Aygo

[motorsportbeng]

This is an unashamed attempt to be my house mate's unbelievably beautiful best friend's knight in shining armour. She has a Toyota Aygo with a leak somewhere in the back causing damp rear seats and boot carpet. I know these cars are designed to be rebuilt quickly and cheaply so I'm guessing it might be a common problem. Anybody have any experience of these?

Thanks!