Perhaps you should read the page again, it makes the point that although the Corolla name has been attached to 40 million units, these were in fact a series of different models each bearing the name of their predecessor, so really not in the Beetle's league as it remained largely true to the original design all the way through it's production.
Similarly, the Golf is now in its 6th (?) generation (although it remains far more loyal to its original concept than did the Corolla).
The beetle's record is unique and likely to remain so all the time the current trend for constant revision and model updates remains in vogue.
Mike 😎
Originally Posted by: Mike Peckham