Red Bull team-mates Max Verstappen and Sergio Perez have taken new power unit elements for their RB18s for this weekend's Azerbaijan Grand Prix.
In particular, Verstappen has been handed a new internal combustion engine, MGU-H, MGU-K and turbocharger, while Perez has a new ICE and MGU-K.
For both drivers, it is only the second of each of the components to be used of the three allowed per season before penalties are applied.
Like Verstappen, it is the same story for McLaren's Daniel Ricciardo, Lance Stroll in his Aston Martin and Williams duo Alex Albon and Nicholas Latifi.
Alfa Romeo's Valtteri Bottas has taken a third ICE, same for Ferrari's Charles Leclerc and Haas' Mick Schumacher with the turbocharger, and Sebastian Vettel with the MGU-K for his Aston Martin.