You'll have to strip anything copyrighted from the mod - name, logos, maybe even the paint? (prolly not though) or else it won't get accepted (for legal reasons, of course).
--- Post updated --- peoplem still got bmw's Paganini zonda's etc with full logos etc, why would it hurt this
The Beetle mod on Wreckfest is called Bugbear Bug so maybe the 53 Bug would work? Incorporate your name and bug together and I can't see it being an issue. Technically Herbie was a '63 Beetle but 53 would still sound correct (ish) for the purists.
Engine Update released. Now 3 different engines available for the bug. Huge thanks to @fufsgfen for reworking the driving-setup! Next update will add the stock bug.