FIA bans Mercedes, Red Bull qualifying power‑unit trick

The FIA has moved to ban a clever qualifying trick that Mercedes and Red Bull employed to sidestep the mandatory MGU‑K power‑reduction rule. By timing an emergency shutdown of the kinetic‑energy recovery system, the teams kept full deployment for the final sector, gaining a 50‑100 kW advantage over rivals. Safety concerns after power‑loss incidents at the Japanese Grand Prix prompted the crackdown.

Why it matters:

• Fair play: The loophole let two front‑running teams extract extra power when rivals were forced to ramp down, skewing qualifying results.
• Driver safety: Sudden loss of power on a hot lap can leave cars vulnerable in high‑speed corners, as seen with Verstappen, Antonelli and Albon.
• Regulatory integrity: Allowing a rule meant for emergencies to become a performance tool undermines the spirit of the 2024 power‑unit regulations.

The details:

• Rule description: The 2024 technical package requires the MGU‑K to reduce output by 50 kW per second as a car approaches the timing line.
• The exploit: Teams used the provision that permits an MGU‑K shutdown during a genuine technical emergency. By activating it on the last sector, they bypassed the ramp‑down and stayed at peak power for the final straight.
• Performance gain: Simulations and on‑track data showed a 50‑100 kW boost over cars obeying the standard ramp‑down, translating into tenths of a second in Q‑lap time.
• Incidents at Suzuka: During the Japanese GP, Kimi Antonelli (Mercedes) and Max Verstappen (Red Bull) suffered abrupt power drops, forcing them to limp through corners. Williams’ Alexander Albon was forced to stop in practice when the system mis‑fired.
• Ferrari’s objection: Scuderia Ferrari lodged a formal complaint, citing the safety risk and the unfair competitive edge.
• FIA response: A new technical directive clarifies that MGU‑K shutdowns are only permissible for genuine component protection, with penalties for deliberate misuse.

What's next:

• Strategy shift: Teams will have to revert to the prescribed ramp‑down, likely altering qualifying set‑up and tyre‑warm‑up plans.
• Compliance monitoring: The FIA plans spot‑checks and telemetry audits to ensure the shutdown is only triggered by verifiable emergencies.
• Performance gap: With the loophole closed, the qualifying field could tighten, giving mid‑grid teams a better chance to challenge the front‑runners for pole positions.