Red Bull identifies power unit fault that ended Verstappen's Monaco race before it began

Max Verstappen’s Monaco Grand Prix ended before it truly started after a power unit failure struck the moment he released the clutch on Sunday, with Red Bull team principal Laurent Mekies confirming the team has since identified the root cause of the retirement.

Verstappen had already sensed something was wrong during the formation lap, then struggled to bring the engine into the correct RPM window during the pre-start procedure. The power unit cut out entirely at the moment of launch, leaving the four-time world champion stranded on the grid.

“We have identified what the issue is,” Mekies told media after the race. “It developed on the formation lap and it gave him or us no chance. So that’s what it is.”

Mekies also revealed that replacing the power unit after Monaco had been the plan all along, regardless of the failure. “It was also the very first PU of Max this season, which was planned to be changed after Monaco,” he said. Running an older engine around the streets of Monte Carlo is a widely used strategy in Formula 1, since the circuit’s tight, twisty layout places minimal demand on straight-line power, allowing teams to preserve a fresher unit for the higher-speed Barcelona circuit that follows.

The timing of the failure made it all the more frustrating given the pace Red Bull had shown across the weekend. Verstappen had qualified second on Saturday — a result that surprised many — after the team found a better setup window between Friday practice and qualifying.

“The guys have been brilliant at finding another optimum point, probably better than the Friday one, at least for qualifying,” Mekies reflected. “Obviously, we can only apologise to Max because the job he had done with the team to get to that level of pace around Monaco was outstanding.”

Verstappen himself struck a measured tone, acknowledging that the retirement stung less given his current position in the championship. Sitting seventh in the standings, the Dutchman is not in a title fight that makes every point critical.

“If I would be leading the championship, then of course it’s a very, very painful one. Like this, it’s less painful, but it’s still really annoying and disappointing for everyone,” Verstappen said. “We know of course that everyone wants to finish every single race, but I just hope that we understand quickly what it is and that we can fix it for the future.”

With a fresh power unit set to be fitted ahead of the Spanish Grand Prix in Barcelona, Red Bull will be hoping the underlying pace shown in Monaco translates into a more complete weekend at a circuit that will offer a far clearer picture of where the team genuinely stands.