At the 2026 Japanese Grand Prix, Aston Martin and Honda completed a full race distance for the first time this season as Fernando Alonso finished 18th in the AMR26. It marked a small but real step in reliability for a partnership still working to find pace. Lance Stroll also reached the flag, giving the team and Honda fresh data under race conditions.
Honda described the finish as proof that the most serious reliability problems have been addressed. The manufacturer called it a "good step" for the project. Engineers at the track said they could now run the car closer to normal settings, rather than in the conservative modes used earlier in the year.
Battery-system issues remain a weakness. Strong vibrations linked to energy delivery have affected both Alonso and Stroll. The same behavior contributed to Alonso’s retirement in China. The team believes the systems are now stable enough to race, but the recovery plan focuses on making the battery package smoother and more predictable across a stint.
Honda and Aston Martin do not expect quick gains. Power-unit upgrades will take months. Work on energy-management software continues, with a broader phase of mechanical engine development planned after the summer. The aim is to improve deployment consistency while keeping reliability intact. That timeline reflects the scale of the hybrid package and the need to validate each change on the dyno and at the track.
The car also needs progress beyond the engine. Aston Martin has aero targets still to hit, especially in high-speed corners. The chassis remains above its weight goal, which restricts setup options and tire management. Those items will take longer to change because they require new parts, correlation work, and manufacturing lead time.
The next four weeks are a narrow window to build on steps made in Melbourne, Shanghai, and Japan. The team plans further updates ahead of Miami, focusing on energy management, cooling, and weight reduction. Trackside operations will keep running the car closer to standard maps to speed learning, while reliability monitoring stays tight. The mood is cautious, but the trend since Australia is forward.
A full-distance finish in Japan does not change the order yet. It gives Honda and Aston Martin a baseline to develop from and a clearer list of what comes next. The work now centers on stabilizing the battery system, refining deployment, and trimming mass, while longer-term engine and aero changes move through design and testing. The target is steady, durable progress rather than short spikes in form.