Services began on the Johnsonville Line on 19 March 2012, having been delayed by a combination of driver training needs, units being required on the other lines due to rolling stock shortages caused by reliability issues with some Ganz units, and the withdrawal of the EO / SE set from service ironically the older DM / D class units used on the Johnsonville line had fewer issues-and operational clearance not being granted by NZTA . While all units are capable of operating on this line, a small number will initially be dedicated to operating the majority of services.
