[esistgut]

It's not a ban on gas vehicles, it's a ban on new sales of gas vehicles. Your car would be perfectly fine.

[petodo]

Until it breaks/crash and the repair won't be economical.

[pwinnski]

There are many cars on the road today that are 15 to 20 years old. There are some cars on the road older than that. Things do get more complicated with recent cars, which have more specialized computing, but you'll be able to burn repurposed dinosaurs for a very long time, regardless of restrictions on new sales.