OBD2 became a standard connection in the US from around 1996. In Europe, it became standard on gasoline (petrol) cars from 2001 and diesels from 2004. How I tested the best Bluetooth OBD2 scanners ...

The more traditional kind is that which plugs into the port and has a screen and scanner built-in. As of late, Bluetooth scanners that connect to smartphones have become increasingly popular.

A teardown shows the Galaxy S25 Ultra S Pen has a circuit board for Bluetooth like its predecessor, but it’s empty.