Mercedes has implemented measures to avoid a repeat of the failure that caused Valtteri Bottas to exit the most recent Formula 1 event at the Nürburgring.
Bottas dropped from pole position to third at the Eifel Grand Prix following a pit stop triggered by a heavy lock-up but was still on course for a podium.
But his Mercedes W11, which was equipped with a fresh engine, started to lose power and he was retired in order to prevent further damage to the car.
Mercedes initially suspected that an MGU-H issue was to blame but later concluded that a failed component within the Control Electronics was the cause.
The team has fitted new Control Electronics to both W11s ahead of this weekend’s Portuguese Grand Prix.
It is only the second CEs taken on by Bottas and team-mate Lewis Hamilton and is within their allocation, meaning they will not incur a grid penalty.
Mercedes has also made calibration changes to the CE in the wake of the failure.
Hamilton, who triumphed at the Nürburgring, leads Bottas in the Drivers’ Championship by 69 points.
Mercedes holds a 180-point advantage in the Constructors’ Championship and has a slim chance of wrapping up the title at Portimao.