Doc 53 - Parts and Parameters been replaced and or changed during Parc Fermé

Several parts and parameters were replaced or changed during Parc Fermé at the 2026 Barcelona-Catalunya Grand Prix with FIA approval.

During Parc Fermé conditions at the 2026 Barcelona-Catalunya Grand Prix, multiple teams replaced various components on their cars. McLaren modified brake ducts and suspension parts on cars driven by Piastri (81) and Norris (1). Ferrari conducted extensive changes on Leclerc's car (16), including front wing, suspension, brake components, and electronics. Other teams, including Williams, Racing Bulls, Audi, and Cadillac Ferrari, made smaller changes such as brake ducts, wheel nuts, seals, and sensors. All changes were approved by the FIA Technical Delegate under regulation B3.5.4, permitting replacements following a written request. Parameter updates were also logged where applicable.