Sim-cade Vehicle Physics is mobile friendly very easy to use Tool. It has a quick setup tool in which you just give references to vehicle body and wheels and click a button and your Vehicle is ready.
This asset will be helpful for you if you are working on Vehicle based game.
The vehicle physics is fast and stable.
fine tuned for fun driving experience.
steering response is very immediate and intuitive.
Full source code included.
suitable for games like GTA, NFS, car stunt games, parking games and more.
The code is very well written so its a great learning resource for beginners.
very easy to modify as your project need.