A fortnight after watching both his cars retire in Shanghai with different faults on the same electrical system, Andrea Stella brought McLaren to Suzuka with two jobs to do: explain what went wrong, and reassure everyone that the Mercedes HPP partnership at the centre of it all was intact.
He started with the anatomy of the Chinese GP. "China was definitely a challenging and frustrating event for us," the McLaren team principal said. "Two cars not being able to take part in a Grand Prix is pretty exceptional as a situation. We understand the source of the problem. In both cases it was related to the electrical side of the power unit. We had faults on the battery, but different faults pretty much at the same time of the week, and in this sense is quite exceptional."
The detail that had rattled Woking the most was the word different. A single shared fault would have pointed to one batch issue. Two distinct failures in the same weekend pointed, potentially, to something more systemic. McLaren's engineers, according to paddock sources, wanted certainty before the Suzuka flights.
Stella's public position is that the certainty has been delivered. "We trust 100% that HPP put in place remedials," he said. "I think we are exposed as a team likewise all other teams may be exposed. There's no team dependency in the kind of problem that we had on the electrical side of the power unit."
He pushed back even harder when asked whether the Brixworth relationship had been damaged. "They are learning together with us. It's not like information is held back. There's maximum sharing. We work very well with HPP and with our engineers. We've been world champions together three times in the last two years. So the relationship is great."
Stella did not, however, pretend the MCL40 was the quickest car on the grid. "The MCL40 is a very high potential platform," he said. "At the moment our car when we compare to Ferrari and Mercedes suffers a bit of a deficit in grip. So Ferrari and Mercedes are faster than us in the corners. I think compared to Mercedes GP, we see that we are probably under-exploiting the power unit a little bit."
That last line is quietly loaded. Stella is conceding that the factory Mercedes team is simply better at extracting its own engine than McLaren is, in the same way customer teams have always lagged factory teams. The 2026 rules were meant to shrink that gap; in practice, at least early on, they have not.
"The main limitation as a customer team has been the timeline," Stella explained. "It's been a push program — it's been pushed from all teams, all competitors. For us certainly it's been a program — the delivery of the MCL40 was pushed up to the last minute, the same has happened for the power unit manufacturers. So it's relatively normal that in this condition as a customer you tend to be a little bit on the back foot."
Despite that, McLaren's season target has not moved. "We should see a positive trajectory and we are confident that McLaren will be in condition to compete for podiums and victories on merit within this season," Stella said.
The Suzuka result — Piastri and Norris in P3 and P5 in qualifying, with Norris overtaking Hamilton for fourth in the race — gave the public message the backup it needed. "The important thing is not about if or what," Stella added, when asked about the gap to Mercedes. "It's about the fact that the progress we saw yesterday in qualifying has been confirmed in the race. So this is a good position to now go into this break, in which we will work hard to improve the car."
The bottom line for McLaren's rivals is that the most commercially complicated relationship on the grid — the Brixworth works team and its most dangerous customer team — just took the first real hit of 2026, and did not fracture.
