The Car is tumbling when turn righ or left

Hi,when the car has a little speed,if it turns left or right,it’s tumbling?Could you help anyone?
you can check screenshot,what is the reason of this? could you give a some advise?

42416-bug.png

Its a general problem with car physic.
If you center of mass is over the height of the wheels you car likes to flip over.
You can set the center off mass lower for your ca via scripting Rigidbody.centerOfMass

That way your car is less likely to flip over.