kick the tires
US /kɪk ðə ˈtaɪərz/
UK /kɪk ðə ˈtaɪərz/

1.
to examine something in a basic way to see if it is acceptable or suitable
:
•
Before buying the used car, he decided to kick the tires and check the engine.
•
We need to kick the tires on this new software before we commit to it.