When should I change the timing belt. on 2007 Kia Spectra

I have not had any problems, but i was wondering about what mileage I should change the timing belt

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2 answers
I BELIEVE ITS EVERY 5 YEARS OR 70K ON A KIA. ILL HAVE TO CHECK MY ALLDATA PROGRAM AT WORK TO BE SURE. I9TS SUDAY AND IM OFF BUT IF U WANT GIVE ME A CALL TOMORROW AND ILL GIVE YOU THE EXACT MILEAGE AND A PRICE. THANKS BRETT ONEILL OWNER OF ARCTIC FREEZE DISCOUNT AUTO & TRUCK REPAIR. 727 585 2074
Recommended replacement 40,000 miles, severe driving conditions. Recommended replacement 60,000 miles, normal driving conditions. Interference engine..