Child object rotation axis problem (Unity 5)

I was trying to make a car game and i came up with this problem, below are screen shots: There are two cars, from which ones wheel rotation is not proper, but the other one's is okay.

First, it was at proper position as other wheels, and when i changed the value of rotation in y axis as marked it resulted into this. This also happens when rotation are changed via scripting. The wheel should rotate in their own position.

In this car below, there is no such issue.

As it is seen the wheel of first car doesnt rotate properly, whereas the other one rotates properly