The dual-voltage (1.5kV dc/25kV 50Hz ac) trains were built by GEC Alsthom and ANF between 1995 and 2005 and are employed on the east-west RER Line A. The 108km Line A links Saint-Germain-en-Laye, Cergy Le Haut, and Poissy in the west with Boissy-Saint-Léger and Marne-la-Vallée - Chessy in the east and carries around 1.2 million passengers per day.

The MI2N modernisation project includes the replacement of seating, floor coverings and lighting, installation of CCTV and new passenger information systems, and improved access for passengers with reduced mobility.

The first refurbished train is due to enter service in 2020.

Île-de-France Mobility is financing the order as part of the broader modernisation of the Paris RER fleet.