Carlos Sainz Jr and Kevin Magnussen are set for five-place grid penalties for Formula 1's European Grand Prix in Baku after changing their gearboxes.
Sainz drops from 13th to 18th on the grid, which promotes Fernando Alonso, Esteban Gutierrez, Felipe Nasr and Rio Haryanto by a place.
The change is the second in as many races after Toro Rosso was forced to swap Sainz's gearbox in Canada when it was damaged in an accident in qualifying.
Magnussen, who qualified 21st ahead of team-mate Jolyon Palmer as Renault filled the back row, will start from the pitlane.
As well as a gearbox change, Renault also made suspension set-up changes to his car in parc ferme.
Magnussen said after qualifying that the team had tried a different direction with the set-up that had not worked.
"We realised after P3 that we were going to be very slow and went a completely different way on the set-up," he said.
"We tried the car in a place that we'd never tried it before.
"It wasn't good but it was the right thing to try something different.
"Not because we thought it would be really better, but just to learn.
"We had some problems and if what we tried could fix some of those problems, then at least we would know.
"We decided to learn instead of going for a perfect set-up."