When to change timing belt?

Hi,

I was wondering if you could give me some advice about my 2009 Hyundia Elantra GLS sedan.

I have about 66,700 kilometers on it and bought it in the summer of 2009.

I have a 8 year extended warranty so
I'm covered until the summer of 2017.

If the manual says to change the timing belt at 48 months under severe service. Do you think I should do it now.

I have an interference engine.

The car is parked outside except at work and always driven gently.

What about the coolant and water pump and timing belt rollers.

Should I pay to have the belt inspected?

Thank you.