Dacia Duster is all-terrain vehicles developed by the Romanian automaker Automobile Dacia. Available in both 4x2 form and with 4x4 transmission for off-road driving. The 4x4 variants make use of Nissan's all-wheel drive system which allows the driver to choose from three different driving modes: Auto mode, in which the front/rear torque split is calculated automatically as a function of available grip. Lock mode, the driver electronically locks it into 4x4 mode, whereby 50 per cent of torque is consistently fed through the rear axle. And 4x2 mode where the transmission is locked into two-wheel drive for maximum fuel efficiency.