single word requests - "Left" and "right" are to "side" as "front" and "rear" are to what?

Is there an equivalent word to "side" when speaking of the front or rear of something (e.g. a car)?

So, a mechanic might say:

You damaged your wing-mirror? Ok, which side?

... or...

You damaged your bumper? Ok, which [insert word here]?

Answer

End

Like "two ends of a stick"?