Yes. Spec is every 90k or 9 years.I have 178-k on my tundra & the T- belt is original, iam leaving in 3-wks.for a 3,000 mile trip, after reading the above I guess I should replace mine?
Best case it breaks on start up and doesn't cause any damage and you still need to replace everything plus spend the time checking cylinder health.
Worst case you bend valves/crack pistons and have to still replace the belt, plus whatever damage or drop in a new engine.
Replace everything, timing belt, serpentine belt, tensioners, idlers, water pump, radiator hoses, thermostat, and coolant.