Tesla revealed that its sales on the first quarter have surged to 69% comparing to the last year’s sales. The automaker has sold approximately 13,450 Model S sedan and about 11,550 Model X sports utility vehicle models. The company has even better expectations, saying it might deliver 47,000 -50,000 Model S and Model X vehicles combined in the first half of 2017. In the fourth quarter, deliveries had fallen 9.4 percent due to short-term production hurdles from the transition to a new autopilot hardware. Tesla had said production challenges, which started at the end of October and lasted through early December, shifted vehicle production toward the end of the fourth quarter, resulting in delayed deliveries. Ultimately, about 2,750 vehicles were missed being counted as deliveries in the fourth quarter either due to last-minute delays in transport or because the customer was unable to physically take delivery.