In this anime TV series, Bumblebee turned into a VW Beetle; in the 2007 live-action movie, he got upgraded to a Camaro
[DOC] [TLE] Browsing Fan Art on DeviantArt [PAR] Instead of a VW Beetle, he is a Chevrolet Camaro (the model year of which is ... 
and communicates through use of selected playback of radio and television 
signals.