In 2023, battery-electric buses in the EU accounted for 36% of new city bus sales, surpassing diesel for the first time. The rapid growth suggests a potential for all new EU city buses to be zero-emission by 2027. While EU regulations aim for a significant share of zero-emission buses by 2030 and 2035, the market is already outpacing these targets. Countries like Slovenia, Denmark, the Netherlands, Ireland, and Finland demonstrate exceptional performance, with ZE city buses comprising over 90% of new sales. The UK leads major markets with a 63% ZE bus share, while Spain, Italy, Germany, and France follow suit. Cities are also taking the lead by setting ambitious ZE fleet targets, with plans for 100% ZE bus fleets by 2025 in some cases. European busmakers are urged to ramp up production to meet the increasing demand for zero-emission buses and avoid being overtaken by foreign competition, with Daimler Buses already aiming for 100% ZE city buses by 2030. To accelerate the transition, cities should set targets for complete ZE bus fleets, OEMs should anticipate demand and focus on ZE sales, and national governments should promote sustainable, European production through public procurement criteria.