Bottas, Russell and Vettel hit with United States Grand Prix grid penalties after PU changes

AUSTIN, TEXAS - OCTOBER 22: Valtteri Bottas of Finland driving the (77) Mercedes AMG Petronas F1AUSTIN, TEXAS - OCTOBER 22: Valtteri Bottas of Finland driving the (77) Mercedes AMG Petronas F1 Team Mercedes W12 during practice ahead of the F1 Grand Prix of USA at Circuit of The Americas on October 22, 2021 in Austin, Texas. (Photo by Clive Mason - Formula 1/Formula 1 via Getty Images)

Valtteri Bottas has taken a new engine for the United States Grand Prix and will therefore take a grid penalty for this weekend's race at Circuit of The Americas, joining Williams' George Russell and Sebastian Vettel of Aston Martin, who have also been hit with penalties for changing Mercedes power unit components.

Bottas has taken his sixth internal combustion engine of the season (three is the limit within the regulations) and sixth exhaust, which has incurred a five-place grid penalty for Sunday's US GP.

GALLERY: Check out the special US GP helmets from Ricciardo, Alonso, Norris and Russell and more

His 2022 replacement, Williams driver Russell, has taken his fourth ICE, fourth MGU-H, fourth turbocharger and fourth exhaust – meaning he will start the race from the back of the grid.

Aston Martin's Sebastian Vettel has also been given a grid penalty after he revealed on Thursday that his team would take new Mercedes power unit parts for the race at COTA.

Vettel has taken his fourth ICE, fourth turbo, fifth exhaust, and fourth MGU-H of the season – and will now also start from the back row.

The stewards confirmed the penalties after the first practice session in Austin.

Last time out in Turkey, Lewis Hamilton started 11th with a 10-place grid penalty and finished fifth.