Depending on the model year and body type of attachment are different. Before disassembly it is recommended that all screws handle "liquid wrench", or a high probability to break them.
Open the hood and Unscrew under the headlight screws securing the brackets to the spars. Unscrew the screws in front of the radiator. In the wheel wells, Unscrew the fasteners to the wings.
In the wheel arches free the fastener to the wings. Climb up under the car and Unscrew the two screws that attach the brackets to the body (depending on body type, the screws can be tightened from the trunk). Pulls the bumper from the guides ago.