My current Model 3, a P3D+, replaced a Model 3 LR RWD.
But, this thread probably means what came before any 3. My car before that was a 2015 Model S P90DL.
In case the thread means what did you switch from before Tesla, my car before that...well, that was still a Tesla. A 2010 Roadster.
OK, going back far enough to get out of Teslas, I had a used 2003 Toyota RAV4-EV.
Going back even farther to get out of EVs, I had a used 2005 Honda Insight (the old 2-seater, with manual transmission - I averaged 62mpg). I had looked for an EV but couldn't find anything available at the time (aside from a Corbin Sparrow, but that only seats one and I still had to drive my kids around).
Before that, I ran a 2000 Golf TDI manual on biodiesel. I had tried to buy a RAV4-EV from California, but the dealer hung up on me.
Before that, I didn't have a car for a few years - I walked/biked/bused/carpooled. (My wife had a car though; we lived in the 'burbs and had kids. But she also went BEV over a decade ago).
I guess I really never have liked burning gas. It has always worked fine for me, but I sure have been having a LOT more fun since I started with the Teslas!