The 4x4 car has major problems with collisions, detecting the road and lag/glitching while driving. I have crashed three of them in the last few days because of this. Considering how much work it takes to get one running, i will not be using them anymore until it is fixed. Really big problem hope you guys prioritize this.
I also killed my car by colliding with a small aluminium street sign, which is silly - they should not damage the vehicle other than aesthetically.