Valtteri Bottas will take a 5-place grid penalty for Sunday's British GP following an unscheduled gearbox change decided by Mercedes.
Damage, similar to the issue which forced Mercedes to change Lewis Hamilton's gearbox in Austria, was apparently detected by the German squad.
"Valtteri's gearbox was damaged in the same way as Lewis', but less severely, and we had hoped to coax it to the end of the cycle," said a Mercedes spokesman.
"However, we have not been able to do so."
Bottas was fastest in both of Friday's free practice sessions but will now face an uphill battle with a 5-spot starting grid demotion.
Mercedes insisted however that the source of the gearbox issue had been indentified and resolved.
"The cause of the damage is now behind us, just as for Lewis' problem."
GALLERY: F1 drivers' wives and girlfriends
Keep up to date with all the F1 news via Facebook and Twitter
Sky F1's Martin Brundle suspects George Russell has every reason to look back on Monza…
On this day in 1979, Jody Scheckter delivered the world title to himself and to…
The legend of the Iceman officially enters its next generation. Robin Räikkönen, the 11-year-old karting…
Lewis Hamilton has moved to extinguish any fears that his opening-lap clash with Charles Leclerc…
Mercedes boss Toto Wolff has watched Kimi Antonelli’s rise from promising rookie to Formula 1…
Williams is turning the clock back in Madrid, swapping the familiar modern-day colours of its…