Slow initial demand and production issues for its 'comeback' car, the Zest compact sedan, has led Tata Motors to delay the launch of its Bolt hatchback by about three months to early next year. Multiple sources close to the development told FE that the Bolt, expected to replace the Vista premium hatchback, will see start of production from December and be launched in the market in January-February 2015, delayed from a previous SOP target of September.