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The fact that the problem usually only occurs at the first start in the morning gives hope.
The Daihatsu Sirion very often have problems with the electric motor of the power steering. Normally the steering columns where the motor is located have to be replaced.
But since it is only at the beginning and usually only at the first start of the day, I suspect that the battery is the cause. Recharge it with a charger or replace it if necessary. If the battery is no longer ok, it is possible that the voltage or the capacity drops so far that after the first start there is not enough current to supply everything. Since the power steering is the component that consumes the most power, it is temporarily switched off.
Therefore you should start with the battery.
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