The change is understood to be precautionary and based on data observed during the previous race in Mexico. It will trigger a five-place grid drop because Ocon finished the Mexican GP, in 11th, and his gearbox has not completed six races.
McLaren holds a 15-point lead after Ocon’s team-mate Sergio Perez retired from the Mexican GP, a double-whammy for Force India as it elevated McLaren’s Stoffel Vandoorne into a higher points-paying position.
Ocon is not the only driver to have a gearbox change in Brazil, but the others are all penalty-free.
Lewis Hamilton, Lance Stroll and Kevin Magnussen move onto a fresh ’box after completing six GPs with the previous unit.