Ferrari has been forced to use one of its two curfew exceptions to change the power unit on Carlos Sainz's SF21.
Ahead of this weekend's Hungarian Grand Prix, the FIA has confirmed that "last night team personnel of the Scuderia Ferrari team, who are associated with the operation of the car, were within the confines of the circuit during the nine-and-a-half-hour period which commenced at 23:30 on 30 July, twelve and a half hours before the scheduled start time of P3 and ends three hours before the scheduled start time of P3 at 09:00 on 31 July.
"This was the first of the two individual exceptions permitted for the Scuderia Ferrari team during the 2021 Formula One Championship season and therefore no action should be taken."
The Scuderia has confirmed that "some of the parameters [on the power unit] did not satisfy us. The PU will now go back to Maranello for checks and inspections".
Sainz will incur no penalties as the team will be using its third power unit of the year.
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