Tesla Model X According to Tesla Motors, deliveries were lower than expected because production was impacted by severe Model X supplier parts shortages in the first two months of 2016, and because Tesla had been too ambitious in wanting advanced features (committed "hubris"). The first Model X that didn't need corrections was made in April 2016. Sales during the second quarter of 2016 totaled 4,638 units. Although production was up 20% from the previous quarter, the number of vehicles in transit at the end of June 2016 was much higher than expected (5,150 including Model S cars), representing 35.8% of the number of
Tesla Model S up 76% over the same quarter the previous year, and setting a new record for the most cars delivered in a quarter. Global Model S sales passed the 100,000 unit milestone in December 2015, three years and a half after its introduction. A total of 50,446 Model S sedans were sold globally in 2015, making the Model S the world's best-selling plug-in electric car in 2015, ahead of the Nissan Leaf (about 43,000 units). , a total of 107,228 Model S sedans had been sold worldwide since its introduction, ranking as the world's second best selling plug-in car ever after