I’ve been unable to mesh in my project because of an unknown error with code ba1b12fb.
Can you please post the link to your project, so we can have a look at it?
It seems like your model has some intersecting parts, and probably small gaps:
Please clean up your model from all intersections and small gaps and try again. Also, you can simplify some parts or details that will not contribute to the overall flow (i.e. the suspension springs).
Finally, you can also try to mesh your model with the Standard Mesher, which is more robust than the Hex-dominant.