According to industry sources, the company has stopped its production of the current SX4 model in order to change engine, which would be in compliant with the Bharat Stage-IV norms.
From April, 2011, 11 cities in India are supposed to be upgrading to the Bharat Stage-IV emission norms and Maruti Suzuki's SX4 is currently in compliant with only Bharat Stage-III norms.
When contacted, an MSI spokesperson declined to comment, saying, "We don't comment on specific model production."