Toyota 4Runner 4WD is an all-wheel drive system that is available in the Toyota 4Runner. It is a full-time system that automatically divides power between the front and rear axles, providing more traction in low-traction conditions. Toyota 4Runner 4WD is designed to be used in on-road and off-road conditions, with selectable 4WD modes (High, Low, and Auto) that allow the driver to select the most appropriate setting for their driving conditions.