The association said the number of new commercial vehicle registrations amounted to 654,657 in January-March period.
Among key markets, Germany (12.8%), the U.K. (8.9%), France (4.4%) and Spain (3.1%) recorded an increase in demand for commercial vehicles.
Meanwhile, commercial vehicle registrations dropped 0.5% in Italy.
Demand for vans -- light commercial vehicles -- grew by 5% to reach 544,085 new registrations in the bloc during the same period.
On the heavy commercial vehicles side, EU demand increased 5.5% to 82,993 new trucks in the same period.
Over the same period, more than 100,708 new medium/heavy commercial vehicles were registered in the EU, marking an annual increase of 5.7%.
"Three months into the year, registrations of new buses and coaches increased only slightly (+0.4%)," the ACEA added.
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