Happy 4th everyone.

I'm in the market for a used CR-V. To date, I've test-driven two, both
5 speed manual transmission. One was a 2000, the other a 2001.

The first, the 2000, that I drove made a loud whirring/humming sound
when the steering was maxed out in a 360 degree turn, in both
directions. My mechanic was wary of the sound and told me he thought
it might be suspension or axle related. The seller scoffed and told me
it was "rear brake noise".

The second one I drove, the 2001 also made the same sound when the
steering was maxed out. The seller had no explanation this time--only
that "maybe it was the tires."

I'm wondering now, since this has happened twice, if this is a
characteristic of the CR-V's, or if somehow, I've driven two cars that
have the same issues which otherwise were in mint condition?

Any thoughts? Thanks for your responses.