Valtteri Bottas will take a grid drop for the Formula 1 season finale in Abu Dhabi with Mercedes having elected to fit a brand new powerunit for this weekend.
The Finn retired from the last race in Brazil with an engine problem that was triggered as the result of high oil consumption.
The broken powerunit was flown back to Mercedes' engine headquarters in Brixworth for checks to see if it could be used again, but it was discovered that it could not be saved.
With Bottas's other powerunits at the end of their mileage and unable to get him through the Abu Dhabi race weekend, Mercedes had no choice other than to bring a brand new engine to use for the last race of the season.
The team confirmed the Finn would start from the back of the grid.
Mercedes said in Interlagos that it was unsure what had been the cause of the eventual failure.
Technical director James Allison said: "We know that we had elevated oil consumption during the race that ran away very sharply - very sharply - about half a lap before we saw it expire.
"The engine stopped itself rather than expired in a heap."