Polish transport operator MPK Poznan has abruptly withdrawn all Solaris Urbino 12 hydrogen buses from service just weeks after finalising a contract for nine additional units with the manufacturer.
According to local reports, the decision was made as an emergency measure after onboard diagnostic systems in some of the vehicles detected unexpected malfunctions on the morning of March 3, 2025.
All 25 hydrogen buses operated by MPK Poznan, purchased in 2023, were impacted. This marks the first major incident involving these vehicles.
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