There's a common mistake about who played the bass on "Drive My Car". Some sources said that it was George, but it was actually Paul, no other Beatle played the bass until the White Album. I think that the mistake came from misunderstanding these George's words from 1977:
"If Paul had written a song, he'd learn all the parts and then come in the studio and say 'Do this.' He'd never give you the opportunity to come out with something. But on 'Drive My Car' I just played the line, which is really like a lick off 'Respect,' you know, the Otis Redding version. And I played the line on the guitar and Paul laid that with me on the bass. We laid that track down like that. We played the lead part later on top of it."
When George said "Paul laid that with me on the bass" it may seem that he's saying that he played the bass because of the "with me on the bass", but it actually means "Paul laid that on the bass with me". George just played guitar as he said in the same sentence, the same line that Paul played on the bass. Paul also played the lead guitar solo.