The attachment of bumpers in C12 and C13 the bodies are virtually identical except for some moments. In C13 the back grille is removed separately from the bumper and under it there is a fastener. There is also differing in the mounting of the rear lights.
How to remove bumper of Nissan Tiida C12 (Versa) (after 2011)
The schemes of fastening of bumpers
How to remove front and rear bumper Nissan Tiida C11 (Versa) (2004-2014)
How to remove front and rear bumper Nissan Tiida C12 (Versa) (after 2011)