​Article reviewed and updated by Jack Renn, July 2026Parc fermé is a French term meaning “closed park.” Once an F1 car leaves the pit lane for qualifying, its setup is locked and teams cannot make major mechanical, aerodynamic, or software changes until the race starts.AdvertisementAdvertisementAdvertisementThe 2026 regulations introduced a Rain Hazard provision and updated Sprint weekend rules that allow teams to unlock and adjust setups between the Sprint race and Grand Prix qualifying.Breaching parc fermé carries penalties ranging from pit lane starts to disqualification, and every car passes through post-race scrutineering in a separate parc fermé enclosure before results are confirmed.Parc fermé means “closed park” in French, and in Formula 1 it refers to the regulated period during which teams are prohibited from making significant changes to their cars. The restriction begins the moment a car leaves the pit lane for Q1 and remains in force until the car leaves the pit lane at the start of the formation lap on race day. As former F1 Sporting Director Steve Nielsen put it, “Parc fermé starts when the cars go out for Q1 on Saturday afternoon, and it ends when the cars leave the pit lane for the start of the formation lap on Sunday.”AdvertisementAdvertisementAdvertisementThe concept exists to preserve the relationship between qualifying performance and race starting position. Without parc fermé, a team could qualify on a low-fuel, high-grip setup designed purely for a single fast lap, then rebuild the car overnight for a completely different race configuration. The rules force teams to qualify and race in the same specification, which means the setup choices made before qualifying carry consequences that last all the way to the chequered flag.Parc fermé also applies after the race. Once the cars cross the finish line, they are driven directly into a designated parc fermé area where FIA technical delegates conduct post-race scrutineering. Cars are weighed, measured, and inspected for regulatory compliance. No team personnel may touch the cars until the technical delegates have completed their checks and released them.During parc fermé, teams can perform a limited set of maintenance and safety-related tasks. Tyres can be changed and tyre pressures adjusted to suit the expected race conditions. Brake pads and brake discs can be replaced if they have worn beyond safe limits. Front wing angle can be adjusted, making it the only aerodynamic change permitted under parc fermé. Cooling fans and dry ice can be applied to manage car temperature. Fuel can be added to bring the car up to its required race load, since teams typically run qualifying with less fuel for performance reasons. And if a car has sustained accident damage during qualifying, teams may request permission from the FIA technical delegate to repair the affected components under supervision.AdvertisementAdvertisementAdvertisementEverything else is off limits. Suspensi