yep! replacing the belt early is so much more cost effective than waiting for it to snap, having the car towed, then replacing all of the parts that have broken down.

pero sa totoo lang, there have been a few cases that cars have been towed to me with broken timing belts but have had no internal problems. usually, the valves break na kapag mabilis takbo then naputulan ka pero if you are stuck in traffic and naputol, usually walang mangyayari sa loob ng engine (this is not always the case tho).

hope this helps