The Williams man drove too slowly on his in-lap during the first part of qualifying, but there was a “set-up error” with his car.
“Car 35 exceeded the specified maximum time between Safety Car Lines on its in-lap at 15:18,” the stewards noted.
“The stewards closely examined the drivers in-lap and found that Car 35 did not drive in a manner that was unsafe or adversely affected any other driver.
“While the driver did exceed the delta time on his dash, it appears that the majority of the time was due to a set-up error.
“The stewards found that the regulation was breached and ordered a reprimand.”
This is Sirotkin’s first reprimand of the season, while Magnussen have been given his second reprimand for his offence.
The Dane drove too slowly back to the pit lane in Q2 in Brazil, but the stewards noted that the Haas man was concerned about the rain.
“Car 20 exceeded the specified maximum time between Safety Car Lines on its post-qualifying in-lap,” the stewards said.
“The stewards closely examined the drivers In lap and found that car 20 took particular care not to impede other drivers.
“The driver also noted that he was concerned with the rain in the circumstances.
“However, the stewards noted that other drivers were setting representative times at this moment, and that the delta time is based on 145% of a representative lap.
“Therefore the stewards found that a breach was committed, but took into account the driver’s concern about rain and imposed a reprimand.”
Magnussen received his first reprimand of the season back in Spain when the stewards deemed him to have impeded Charles Leclerc in first practice.