How much g force can a car withstand?

This is kind of an open ended question.

I will define the Word "withstand". In this case I will mean to be undamaged.

Formula 1 cars do 3 to 5 gs in a corner

Some extreme use street cars can pull almost 1.5 gs cornering or braking.

In a crash some cars can protect the passengers to over 90 g in a crash, but the car is destroyed in the process.