Ferrari are amongst five teams to have made engine and/or gearbox changes in the build-up to qualifying for the Miami Grand Prix.
Following his crash during FP2 on Friday, Ferrari have taken the decision to replace Carlos Sainz's Control Electronics unit.
They are not alone, with Alfa Romeo, Williams, Aston Martin and Haas also needing to make changes on Saturday.
Valtteri Bottas (Alfa Romeo) has taken a new Turbocharger, MGU-H and Exhaust System after he crashed during Friday practice, while Kevin Magnussen (Haas) has taken a new Exhaust System of his own.
No drivers have been given penalties for the changes.
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Three drivers take new gearbox components
Lanco Stroll (Aston Martin), Alex Albon (Williams) and Bottas have all taken fresh gearbox parts ahead of qualifying.
All three will qualify with a new gearbox case and cassette, while Stroll and Albon have also taken a new driveline, gear change components and auxiliary components.
As per the engine changes, no drivers have been awarded penalties.
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