Took several months, but I’ve finally managed to produce seemingly fully functional car rig in Blender. Expect a tutorial in the near future!
EDIT: Tutorial is done and ready! Here you go:
It’s great to see another video from you, blazraidr! The car animation looks very good, I’m interested to see how your rig works. A good car rig is something many people will be eager to learn about.
Very nice work!
Yes that was cool, and the materials on the car too. The drift effect si very great, I wonder how you control it and how the car reacts. I don’t like really cars so much so I didn’t try yet to do one and animate it but I’m pretty sure you can’t find tips on internet so easely about how to rig it. Even if it seems not so compicated (only a few bones), the constraints and IK’s (I assume there’s IK’s, I’m a rookie, I don’t know too much about it) may be quite tricky. If once you give your secrets, I’ll be glad to know them. 
Very good !!
wheel the rig looks pretty good however. I don’t know if u know but that jag has very very stiff suspension and there is acctualy nooo body roll from side to side so… i would acctualy decrease that by 90%
Well done!
Looks great man! I’m interested in your explanation
Nice rig, it looks pretty good. But what do I know about rigs? almost nothing? 
I will wait for the tutorial!
Very nice rig! Tutorial will be good!
I’ve been keeping an eye out for a good car rig for a long time now…very keen to see a tutorial. I found your videos relating to the car model really interesting! Dare I ask…have you any intention to share on Blendswap?
I can’t wait to see the tutorial.
While watching you video, I was thinking to the inertia on break. And you’re working on it : great !
Updated inertia system looks good to me thus far 
waiting for the tutorial, that is amazing!
Tutorial is done and ready! Here you go:
I’m having some issues with the path length and wheel rotation. On my model, all 4 wheels are exposed, no bodywork, so I’d like them to rotate at the correct speed per wheel. If I follow your example, they follow the path down the centre of the car, so all wheels rotate at the same speed, but the wheels are obviously offset from the centre, and your method does not allow for this. To get around this, I duplicated the curve, tilted the points by 90deg and extruded to the width of the wheels. The edges of this curve are now the actual path the wheels follow. By converting to a mesh, and back to 2 curves, I have the lengths that each wheel follows, and added custom properties and updated the drivers. All good so far, except that the path length divides equally over the length of the curve, it does not allow for the changing curvature, so if my curve starts straight before it curves, the wheels rotate at a different rate even on the straight. Any ideas?