There are two pins held in by 10mm grommets. you'll need to get under the bumper though to reach them. This may help
https://video.search.yahoo.com/search/video;_ylt=AwrExo9RTdNbEzcAXoaJzbkF?p=2003+bmw+z4+hood+badge+removal&fr=ymyy-t-999&fr2=p%3As%2Cv%3Ai%2Cm%3Apivot#action=view&id=3&vid=9c3cd2eaf8784d766befc70e1e827ba9