Here are just some of the features I have modelled in Maya using NURBS:
http://www.xanderstudios.com/Arellia/images/VXTire.jpg
http://www.xanderstudios.com/Arellia/images/VXSeat.jpg
http://www.xanderstudios.com/Arellia...VXSteering.jpg
Let me know what you think...
Brent