FIA clamps down on Mercedes and Red Bull qualifying engine trick

The FIA has issued a new technical directive to close a loophole exploited by Mercedes and Red Bull, which allowed their cars to circumvent mandatory power reduction rules during qualifying laps. The trick, which involved strategically shutting down the hybrid system's MGU-K, gave these teams a significant power advantage over rivals. Following complaints and safety concerns, the governing body has clarified that the procedure is only for genuine emergencies, not performance gains.

Why it matters:

This intervention highlights the ongoing high-stakes technological battle in Formula 1, where teams constantly seek marginal gains within the complex regulations. Closing this loophole is crucial for maintaining sporting fairness and safety, as its misuse could lead to unpredictable car behavior on track. It also underscores the FIA's reactive role in policing the fine line between innovation and exploiting regulatory gray areas.

The details:

• The trick exploited a rule designed to protect the MGU-K (Motor Generator Unit - Kinetic) during a genuine technical failure, allowing a team to shut it down completely.
• Normally, on the approach to the finish line on a qualifying lap, cars must reduce energy deployment by 50 kilowatts per second—a "ramp-down effect."
• By triggering an MGU-K shutdown, Mercedes and Red Bull-powered cars avoided this ramp-down, maintaining maximum power deployment for longer and gaining an estimated 50-100kW advantage.
• While the shutdown triggers a 60-second system lockout—catastrophic in a race—it had minimal consequence on a qualifying cooldown lap, making it a perfect qualifying-only exploit.
• Rival teams, including Ferrari, raised the issue with the FIA, citing performance and safety concerns after observing the tactic in Australia and Japan.
• The FIA's new technical directive clarifies the original intent of the rule, stating the procedure must only be used for emergency component protection, not for strategic performance benefit.

What's next:

With the technical directive now in force, Mercedes and Red Bull will lose this specific qualifying advantage, potentially tightening the grid in Saturday sessions. The move reaffirms that the FIA will act to shut down clever interpretations that compromise the spirit of the rules, especially those with safety implications. Teams will now need to find performance within the clearer, intended boundaries of the power unit regulations, shifting the development focus elsewhere.