Daniil Kvyat will join teammate Daniel Ricciardo on a 10-place grid penalty in Austria after Red Bull boss Christian Horner confirmed that the Russian is taking a fifth V6 overnight.
Although it was always on the cards that both drivers would change, only Ricciardo took a new engine for today, while Kvyat managed to get through Friday practice with his fourth unit.
However the team does not want to push its luck into Saturday and Sunday.
"He'll be changing tonight,” Horner told Motorsport.com.
"Obviously it's far from ideal in Austria, but it was unfortunately on the cards as soon as we got onto engine four very early on.”