Aston Martin and Honda's F1 Dream Is In Serious Trouble Right Now

Aston Martin’s start to Formula 1’s new era has been consumed by reliability concerns around the Honda power unit.

During recent pre-season testing in Bahrain, Aston Martin was forced to cut short a day of running after what Honda Racing Corporation (HRC) described as abnormal vibrations within the power unit system. According to HRC powertrain chief Ikuo Takeishi, the issue was serious enough to warrant parking the car as a precaution.

“We stopped the car because we felt it shouldn’t continue running in that state,” Takeishi said, explaining that while there was no immediate risk of an accident, the situation was considered unsafe to continue.

At the core of the issue are violent harmonic vibrations from the 1.6-liter V6 internal combustion engine. Takeishi told Motorsport.com the vibrations are effectively shaking the battery assembly within its mounting structure. The exact source of those vibrations isn't known. They could stem from the combustion engine, the transmission, the chassis, or some interaction between multiple components.

“If the cause were pinpointed to something like the transmission or the engine, it would be much easier to tackle,” Takeishi said. “However, I suspect multiple components are interacting to generate the vibration.”

Senior technical staff from both organizations are working to find and fix the problem, with personnel in the UK and at Honda’s Sakura facility working around the clock ahead of this weekend's 2026 season-opening Grand Prix in Australia. Aston Martin’s chief strategy officer Andy Cowell, who previously oversaw Mercedes’ dominant hybrid-era engine program, has flown to Japan to assist.

Despite the difficulties, Aston Martin is expected to field both cars at the Australian Grand Prix. The team faces pressure to at least meet the FIA’s 107 percent qualifying threshold, though. Motorsport suggests that even finishing races may be a secondary goal until reliability improves; it's thought Aston Martin may retire both cars after a handful of laps to satisfy their contractual obligations to the series.

Honda’s home race at Suzuka later in March could be a potential milestone for progress.

The 2026 regulations usher in a new technical framework that increases the role of electrical power within the hybrid system.

Every manufacturer is swimming in unfamiliar water, but Honda is doing so while also integrating with a new works partner after exiting and re-entering the sport in different capacities over the past decade. The problems at Aston Martin strongly echo Honda's growing pains during its last re-entry into the sport with McLaren from 2015 to 2018. Of course, Honda's effort rebounded once installed in the back of the Red Bull, pushing Max Verstappen to four consecutive driver's championships between 2021 and 2025.

There are even hints that Honda's combustion engine may not be delivering enough power in certain scenarios to maintain an optimal battery charge. Until the reliability issues are addressed, the team cannot understand the powertrains' full performance potential or accurately plan upgrades.

AutoGuide's Take:

Aston Martin team owner Lawrence Stroll has invested heavily in new facilities at Silverstone and recruited high-profile technical talent, including Adrian Newey, to elevate the squad into a consistent title contender. An underperforming power unit undermines everything before the season has even begun.

Become an AutoGuide insider. Get the latest from the automotive world first by subscribing to our newsletter here.