At what mileage should I have the timing belt replaced? I have 145,000 on 2002 Hyundai Sonata

Other than oil changes no service has been done. Runs strong but worried about mileage and other service that may be required to keep it in good shape.

Asked by for the 2002 Hyundai Sonata
Needs to be done asap! Past due and it is an interference engine! If the belt breaks or slips, engine damage is likely. Major engine damage!