Car rolls over when turning in real-time

I Followed a tutorial on making a car, and it worked fine but then when i created a more complex model of a car at the slightest turn with a little speed the car rolls. I think it may have something to do with coliders and rigid body? I have tried a few thing but am stuck. I made the model in Blender

Hard to answer this, as cars are complex systems and there are many things that could go wrong. The most likely thing is that the center of mass for your rigidbody/car ist too high. You can try to fix that via scripting using the rigidbody.centerOfMass property.