The increase was buoyed by preferential import tax policies, under Vietnam’s commitments to the ASEAN Trade in Goods Agreement, the Ministry said. 

Under the agreement, the import tax on automobiles from ASEAN members to Vietnam would fall from 50% to 40% by 2016, to 30% by 2017 and 0% by 2018.

Vietnam's special consumption tax on cars will fall to 40% from 45% on July 1.