Why UV map is not shown properly in unity?

I have designed a car 3D model in 3Dsmax and I used unwrap UV modifier to place each part of the texture,in the right place.when I render it in 3DS max,it’s ok.but when I export it to unity as an “.FBX” file it does NOT show the texture properly!
in fact,no texture is shown! eventhough I have imported the texture as well as 3d model!
could some one help?

Drag your object from Project into your Scene view. It should appear with no texture on it.

Now drag your texture directly from your Project view onto the object. Unity will create a new material using that texture and apply it to your object.