 In 2008 the class were modified to shut down the engines after a period of inactivity if the drivers cab key was off, and in 2018 it was announced one three car unit was to trial a ZF transmission to replace the original Voith and it was hoped this might yield 19% fuel savings in some conditions.An additional nine cars are to be fitted with a diesel-battery hybrid MTU/Rolls Royce power pack as a trial, with route-dependent fuel savings of up to 33% 

In 2018, it was announced that Iarnród Éireann were seeking to procure a further 41 new 22000 Class vehicles, encompassing three additional units plus a number of intermediate trailers intended to lengthen some of the existing fleet.The ultimate aim is to return the fleet to a mix of three and six-car sets.