As FormulaUno.it reports, McLaren is facing a critical moment of introspection after a difficult weekend in Sepang exposed unexpected weaknesses in their latest aerodynamic package. For the last four years, the Woking squad's in-season developments have typically delivered immediate and decisive performance gains over their rivals. But this season, under the guidance of Andrea Stella, things haven't quite clicked with the same infallible precision.
The troubles began with the upgrade package introduced in Baku, which was designed to push the MCL40 from a third-force machine into a consistent contender capable of harassing Mercedes through the final stretch of the year. Instead, the reality of the Malaysian weekend hit hard. "The reality is that this fine weekend our car package was in fourth place in terms of performance," the Team Principal admitted.
That slump has dealt a severe blow to their Constructors' Championship aspirations. Following the Spanish Grand Prix, the gap sat at a manageable 52 points to second place. Needing to claw back less than six points per round, overturning the deficit to Ferrari looked entirely plausible. Fast forward through the Azerbaijan and Bahrain grands prix, however, and that margin has blown out to 89 points—surpassing the team's previous maximum deficit of the year and now demanding an average recovery of more than 12 points every single weekend.
Data analysis suggests the new components have successfully delivered mechanical grip and aerodynamic load as intended, while boosting straight-line efficiency. Yet the trade-off has been painful, most notably a severe drop in low-speed cornering performance that has undone much of the summer progress made with the papaya car. Both Red Bull and Ferrari have previously stumbled into the trap of narrowing their car's operating window through aggressive development, and the burning question now is whether McLaren has fallen into the exact same rhythm.
"We actually increased the potential of the car with the updates. The information we have tells us that is the case. It's more the competitiveness on track to suggest that we seem to have lost a little bit of ground compared to the others," Stella explained in Malaysia. While the absolute potential on paper may be higher, extracting that speed across changing track layouts has become an uphill battle. Hopes that Sepang's asphalt would suit the MCL40 quickly dissolved as the car languished as the clear fourth force, falling further behind Ferrari and Mercedes.
The immediate focus shifts to the upcoming Sprint weekend in Singapore, a relentless sequence of slow corners that will provide another acid test for the package. If answers remain elusive there, all eyes will turn to Austin, a venue circled in red by the factory as a track where they expect to fly. Beyond that, further developments are locked in. "And then we'll tackle the final races. Actually something will still come for the final Grands Prix. So, hopefully, we can take another step forward and return to a condition of fighting for the podiums," Stella teased. Additional upgrades for the MCL40 are scheduled to debut around the San Paolo Grand Prix in early November, even as development runs parallel with the 2026 machine.
