The same way: "Ezek az autók." The only difference is that this latter phrase is an entire sentence, while in the sense of "these cars" it is part of a larger sentence, e.g., "Ezek az autók pirosak."/"These cars are red." In practice it's clear from the context what is meant.
In addition, the sentence here means these are cars. So, to give you the full picture:
ezek az autók can be a phrase (without being a full sentence) meaning these cars.
Ezek az autók. can be a full sentence meaning These are the cars.
Ezek autók. can only be a full sentence meaning These are cars.