Bottas takes on another new engine part for Italian GP

Valtteri Bottas will start Sunday's Italian Grand Prix from the very back of the grid, having taken on his fourth power unit of the year.

With only three power units permitted over the course of a season, as per current F1 regulations, Bottas will line up at the back of the grid at Monza after changing his Combustion Engine (ICE), Turbocharger, MGU-H and MGU-K.

However, having already incurred that penalty, Mercedes have made the decision to add another engine component to Bottas' pool.

Bottas has now taken a new Control Electronics unit, his third of the year. Just two of these units are permitted per season, meaning Bottas will incur another grid penalty. This won't affect his starting position, given that he is already set to start from 20th on the grid for Sunday's race.

"This is in addition to the previous penalty," read a statement from the stewards.

"The competitor [Bottas] is still required to start the race from the rear of the starting grid."

As the grid penalty only applies for Sunday's Grand Prix, he will start first for the Sprint Qualifying race on Saturday afternoon.