Past their endurance threshold, mechanical components start firing failure rolls every lap. The warning ladder (Yellow → Orange → Imminent) gives you 30s+ to react before DNF. Cooling system perf, engine fiability, supplier reliability, and engine map all affect the rate.
This page will deep-dive the failure model, the AI’s pit-or-DNF decision, and how to nurse a wounded car to the flag.
In the meantime, Parts, Damage & Wear covers heat damage and the warning indicators.