My previous car was a 370z with a manual transmission. Where I used to live was not a great part of town and we had a series of break-ins and stolen vehicles. One morning I go out and see I had a chip in my driver’s side door window where they pried it open, evidently saw it was a manual, then did nothing lol

So evidence would suggest if you drive a manual transmission, your vehicle is less likely to be taken by a criminal.