Honda conducts historic Sakura chassis test to address Aston Martin’s severe vibration crisis

Honda uses a full Aston Martin chassis for Sakura static tests to solve the AMR26’s vibration crisis. Reliability upgrades set for the Miami GP.

By: AXL Media

Published: Apr 28, 2026, 11:54 AM EDT

Source: Information for this report was sourced from PlanetF1

A First-of-Its-Kind Integration at Honda’s Sakura Base

The five-week gap between the Japanese and Miami Grands Prix has allowed for an unprecedented level of technical collaboration between Honda and Aston Martin. Shintaro Orihara, Honda’s trackside general manager, confirmed that a chassis was shipped to Japan for exhaustive static evaluations, a move necessitated by the complex integration of the new 2026 power unit. While Honda typically focuses on bench-testing engines, the severe nature of the AMR26’s vibration issues required a "live" chassis to understand how harmonic frequencies from the battery and combustion units were being amplified through the frame. This marks a critical step in a partnership that has faced a trial by fire since the season opener in Australia.

The Physical Toll of the AMR26 Vibration Issues

The technical failures have had a direct impact on driver welfare, with Fernando Alonso reporting that his hands would become "numb" after less than half an hour behind the wheel. The severity of the harmonics prompted concerns from team principal Adrian Newey regarding potential long-term nerve damage, highlighting the urgency of the Sakura testing. During the first two rounds in Australia and China, the team failed to see a checkered flag, as vibrations were suspected of damaging sensitive electronic components and battery cells. However, a breakthrough of sorts was achieved at Suzuka, where Alonso managed to complete the race in 18th place, providing the first full-distance data set for the engineers at HRC.

Tempering Expectations for the Miami Upgrade Package

Despite the intensive work in Japan, Honda has been candid about the timeline for a definitive performance boost. Orihara warned that while "countermeasures" developed at Sakura will be implemented for the Miami Grand Prix, they are primarily aimed at reliability and driver comfort rather than outright lap time. The chief engineer stressed that fans should not expect "big jumps forward" in the power unit’s performance metrics this weekend. Instead, the focus remains on stabilizing the platform to allow the team to begin their aerodynamic development program, which has been largely sidelined by the ongoing mechanical crisis.