Valtteri Bottas’ retirement from the Eifel Grand Prix was initially attributed by Mercedes to an issue with his MGU-H system. But in the run-up to the Portuguese Grand Prix, the team confirmed that it had in fact been a Control Electronics issue on the Finn’s W11 that had ruled him out of the race – and left him with a mountain to climb to get back on terms with his team mate Lewis Hamilton in the title fight.
Bottas was forced to retire out of contention for victory at the Eifel Grand Prix after reporting a loss of power, with the team’s Chief Strategist James Vowles initially reporting: “We could see on the data that the MGU-H, the hybrid element that produces electricity but also turbo control, wasn’t working correctly.”
However, further investigation by the team revealed that the root cause had actually been related to the Control Electronics unit on Bottas’ car.
“We have identified a failed electrical component in the Control Electronics as the cause of the problem,” said Mercedes Team Principal Toto Wolff in the build-up to the Portuguese Grand Prix, “and the evidence suggests that swift action in retiring the car prevented mechanical damage to his power unit.”