Nissan Motor India Pvt Ltd said it has registered total sales of 1,256 units in September 2010, with its newly-launched compact car Micra clocking 1,183 units. In the same month last year the company sold a total of 57 units only. The company had started nationwide sales of the Micra on July 15 and has sold 928 units in the starting month. Since its launch, NMIPL has sold a total of 3,293 units of Micra.…