Jean-Eric Vergne and Pastor Maldonado have both been handed 10-place grid penalties for the Japanese Grand Prix after changing their engine for a sixth unit.
The pair had both headed to the Japanese GP on their fifth unit, but failures in practice mean both have been forced to install new units.
As per the regulations, the first sixth unit results in a ten-place penalty which pushes Vergne down to 21st position after he qualified 11th.
“Unfortunately Jev [Vergne] takes a ten place grid penalty because today’s engine change meant fitting his sixth of the season,” explained Toro Rosso technical director Ben Waterhouse.
Maldonado meanwhile will start last after qualifying 17th. As he can only be moved back five places, he will still need to serve a further five-place penalty at the Russian GP next weekend.