Honda Racing Corporation president Koji Watanabe has revealed that Honda actually introduced its second ADUO (Additional Development and Upgrade Opportunities) upgrade as early as Formula 1’s Spanish Grand Prix, with the upgrade focused on the power unit's turbocharger.
Aston Martin and Honda struggled from the start of the season, but their performance slightly improved after a major chassis upgrade was introduced at the Hungaroring. In Zandvoort, the team also introduced a power unit fitted with the first ADUO upgrade.