Brendon Hartley will start from the back of the grid for Sunday’s French Formula 1 Grand Prix after his Toro Rosso team was forced to fit the New Zealander’s STR13 with a completely new power unit.

The former FIA World Endurance Championship winner was forced to stop his car in the final minutes of Friday’s second practice session with a sudden loss of power and told reporters after the session that he suspected he would have to have an engine change.

The Italian team’s works partner, Honda, confirmed that it has fitted a new internal combustion engine, MGU-H, turbocharger, MGU-K, control electronics and energy store to his car ahead of Saturday’s final practice session and qualifying.

Hartley had already reached the limit of components he could use without penalty this season, having swapped to Honda’s upgraded power unit at the preceding Canadian Grand Prix.

Under the 2018 regulations, a 10-place grid penalty is automatically applied for the first time an additional power unit element is used, with five further grid places for each new element in the same power unit. Hartley’s 35-grid place penalty, exceeding the maximum of 15 places which automatically trigger a start at the back of the grid, means he will start from the final row of the grid on Sunday’s race.

His new power unit matches the upgraded specification Honda introduced in Canada.

Image via Red Bull Toro Rosso Honda

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Richard Bailey

Founder & Chief Editor at MotorsportM8
Hasn't missed a Grand Prix since 1989. Has a soft spot for Minardi. Tattooed with 35+ Grand Prix circuits.