Mercedes drivers set to use fresh power units in Miami, Ferrari stick to old units
As the season is approaching the end of its first quarter, more than half of the field has elected to run a fresh power unit at this weekend's Miami Grand Prix, although Ferrari drivers Lewis Hamilton and Charles Leclerc stick to their old units.
For the 12th year running, the 2025 F1 cars are powered by V6 hybrid turbo power units with 1.6-litre engines. This season represents the last year the current engine configuration appears before being replaced by a new power unit formula in 2026.
Current F1 power units feature seven elements: the internal combustion engine (ICE), motor generator unit-heat (MGU-H), motor generator unit-kinetic (MGU-K), turbocharger, energy store (ES), control electronics (CE) and exhaust.
Over the course of the 2024 season, a driver may use no more than four ICEs, MGU-Hs, MGU-Ks and turbochargers, two energy stores and control electronics, and eight of each of the four elements that make up a set of exhaust systems (comprising primaries left-hand side, primaries right-hand side, secondary LHS and secondary RHS).
Eleven drivers will race with a fresh internal combustion engine. Mercedes has elected to equip all cars with a fresh ICE which means that George Russell and Andrea Kimi Antonelli, Oscar Piastri and Lando Norris, Carlos Sainz and Alexander Albon, Fernando Alonso and Lance Stroll wil all line up with a new unit on the grid today.
Alongside the Mercedes-powered cars, three Ferrari-powered machines will race with a new ICE - the Haas of Esteban Ocon and the Saubers of Nico Hülkenberg and Gabriel Bortoleto.
The same eleven drivers received a fresh turbocharger, MGU-K, MGU-H and exhaust system for the Miami Grand Prix weekend.
Following Charles Leclerc's heavy crash on the sighting lap to the grid ahead of the sprint race, Ferrari equipped his SF25 with a new control electronics.
Aston Martin was also forced to make unplanned changes in Fernando Alonso's car after the Spaniard's collision with Liam Lawson. The two-time F1 champion received a fresh energy store and control electronics after the 100km dash.
