I kena before putus at 33k km on 4G63 before. Entire head need to be replaced. Luckily not expensive.

Myvi is chain la.

If belt putus is not timing but the accessories belt.

Also when the accessories belt putus, the car will have no power steering, aircon and alternator hence no power. But the engine still runs from the battery. Once the battery kaput, the engine will die.

Timing chain will control both water and oil pumps so the engine will survive long enough to get it fix at the workshop.

Smart girl. An ordinary person would have panicked and still drive on.

True but the chain guides usually made from plastic and will wear out cause noisy chain rattles.