The 7th Generation Toyota Celica (years 2000 - 2005) all use the same bumper attachment locations. The entire front, the entire rear, and aftermarket side skirts for this generation are also interchangeable between this same generation.https://www.celicahobby.com/forums/...umper-attachment-locations-pictures.html
The front bumper attachment locations:
Photos of a 2001 Celica front bumper, with a 2004 front bumper just behind it.
The 2001 Celica front bumper has an aftermarket lip-kit attached to it, but this does not affect the attachment of the front bumper to the body of the Celica.