The 2026 F1 season has begun in turmoil for Aston Martin F1 Team, whose new works partnership with Honda Racing Corporation has been shaken by severe power unit vibration problems.
After a difficult opening weekend at the Australian Grand Prix in Melbourne, HRC president Koji Watanabe said the team is targeting the Japanese Grand Prix at Suzuka as the first major milestone to fix the issue and allow the AMR26 to run normally.
The vibrations have damaged battery systems, limited track running, and left drivers Fernando Alonso and Lance Stroll physically struggling in the cockpit. Engineers now race to stabilise the car before the season slips away.
A pre-season built on alarm
The warning signs appeared early in pre-season testing in Bahrain.
Aston Martin barely completed 2,000 km of running. That distance was close to just one-third of the mileage logged by top teams such as Mercedes and Ferrari.
The situation worsened on the final day. Aston Martin completed only six installation laps after the team ran out of spare batteries.
Engineers first suspected a cooling or software problem. Later analysis showed something more serious. Strong power unit vibrations were shaking the battery system and causing damage.
HRC four-wheel racing head Ikuo Takeishi said the team stopped the car because the situation could become dangerous if it continued running.
The vibrations made diagnosis difficult. Engineers believe several components may be interacting to create the problem, rather than a single faulty part.
Some of the trouble traces back to design changes made after renowned designer Adrian Newey joined Aston Martin in March 2025.
Honda F1 project leader Satoshi Tsunoda said the team requested an extremely compact power unit layout. That led Honda to adopt a two-level battery design and revise mounting concepts.
Honda also conducts virtual track testing at its Sakura facility rather than alongside the chassis team in Britain. That created a mismatch between simulation results and what the car experienced on track.
Drivers felt the problem directly.
Stroll said the vibration felt like “electrocuting yourself in a chair.” Alonso reported numbness in his fingers and feet caused by constant low-frequency shaking.
A chaotic Australian Grand Prix
The season opener in Melbourne brought little relief.
Alonso missed the first practice session at Albert Park after the team detected an issue before running began. Stroll barely ran during Friday’s practice.
The problem worsened on Saturday. Stroll could not take part in either final practice or qualifying and started last on the grid.
During the race, Aston Martin made an unusual call. Both drivers briefly retired their cars, then restarted them so engineers could gather valuable data.
Alonso eventually stopped on lap 39 of 58. Stroll completed 43 laps and finished as the last classified car, recorded as non-classified.
Honda had already introduced small changes to reduce vibration in the battery system. Even so, Alonso said the feeling inside the cockpit remained close to what drivers experienced during testing.
He said Honda believed battery vibrations had dropped, but the chassis still needed better isolation from the battery pack.
Signs of improvement, Suzuka in the crosshairs
Despite the troubled start, Honda sees early signs that the fixes are working.
Speaking to Shiga Sports after the Australian race, Watanabe said engineers had taken steps to reduce vibration in the battery and motor. Those changes should allow the team to increase the number of laps it could run.
According to Watanabe, drivers confirmed the difference. Stroll said the vibration now felt about half as strong as during testing.
Still, the short-term outlook remains difficult.
For the upcoming Chinese Grand Prix, Aston Martin will bring no upgrades and has no spare batteries. The team must manage running carefully just to complete the weekend.
The main target now sits one race later.
According to a report by Last Word on Sports, Watanabe said that the team wants the power unit ready for full use by the Japanese Grand Prix at Suzuka.
“We are still limiting how we use the PU,” Watanabe said via LWOS. “At this point, we cannot say anything about the performance of the power unit or the car. So we are not yet using it in the way that it should be…”
“It’s not just about the power unit or the car body. It’s important to make the whole car competitive,” he added. “Our first target is Suzuka [the Japanese GP]. By then, we want to make progress on vibration countermeasures and get the PU in a state where it can be used properly.”
Watanabe said he speaks daily with Newey about the fastest way to restore the car’s competitiveness.
Honda F1 chief Shintaro Orihara also confirmed after the Australian Grand Prix that data shows battery vibration levels continue to fall. He said the team now believes a full race distance is achievable.
Both sides still show confidence in the project. Newey has said he believes Honda can bring the power unit to a competitive level based on its past success.
For now, the road to Suzuka will decide whether Aston Martin’s troubled start becomes a short setback or the defining problem of its 2026 season.
