F1: McLaren Escapes Penalty as FIA Dismisses Water-Based Tyre Cooling Claims

The FIA has officially cleared McLaren after an investigation into suspected illegal tyre cooling methods following the 2025 Miami Grand Prix. The probe was launched after McLaren’s dominant start to the season, which included five wins in the first six races, raised questions among rival teams. The team’s tyre management sparked suspicions of unfair advantages, with some pointing to tactics like water injection—an idea previously suggested by Red Bull in 2024.

The FIA focused its investigation on Oscar Piastri’s MCL39, especially after his win in Miami. The inspection looked closely at whether the brake system was used to cool the tyres, which would breach Article 11.5 of the FIA Technical Regulations. This rule specifically bans liquid-based brake cooling methods. After a thorough review, the FIA confirmed that Piastri’s car complied fully with all rules.

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According to the document: 'After the race in Miami car number 81 was randomly chosen among the top ten cars for more extensive physical inspections.'

'Subject to these physical inspections were the wheel bodywork assemblies. The following checks were carried out on all corners: The compliance of all components with TR Article 3.13. Physical checks for compliance with TR Article 11.5 on all four corners.

'All inspected components were found to be in conformance with the 2025 Formula One Technical Regulations.'

Despite the rumours and accusations, McLaren has consistently denied any wrongdoing. The team credits its performance to strong car design and expert tyre strategy. The FIA’s latest report supports this claim, stating there is no evidence of rule-breaking. This official clearance gives McLaren a strong position to respond to ongoing speculation.

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With the FIA’s investigation closed, McLaren can now shift focus back to the 2025 Formula 1 championship. Their tyre wear management has proven to be a major strength this season. While rival teams continue to question their methods, the governing body has confirmed full compliance with F1 regulations.