WARNING: This page is about a different car, the 2004 Mercury Monterey and 2004 Ford Freestar. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Right side shown, left side similar.
Fig 1: Drilling Out Four Spot Welds
Courtesy of FORD MOTOR CO.
Drill out the four spot welds.
Disconnect the ambient air temperature wire harness from the lower bumper.
Fig 2: Disconnecting Ambient Air Temperature Wire Harness