Ah the ol’ 7H3M. It’s cool that you have no idea what this is, that’s basically our job. In internet slang speech sometimes a 7 is used in place of a T, and more obviously 3’s are E’s.
So this Vanity license plate is a more boring “Them”
We pulled this picture from our archives so more likely than not this TDI is in the scrap heap now because of the Volkswagen Dieselgate disaster.