The first six-car Z 58000 trainsets were introduced to regular passenger service on line E of the RER on 13 November 2023.

[2] The design of the RER NG is similar to Bombardier's Regio 2N trainsets with a mix of single and double-deck cars.

The doors located just behind the driving cabs are fitted with gap fillers to enable level boarding for passengers using a mobility device, like a wheelchair.

Despite the fact that the RER NG is heavier and up to 17 metres (55 ft 9 in) longer than a MI 84, it is able to meet this standard with its eight or ten motorised bogies.

The six-car class Z 58000 trainsets are in operation on RER line E. They are based at the Noisy-le-Sec and Nanterre SNCF depots.

The seven-car Class Z 58500 trainsets in operation on RER line D. They are based at the Villeneuve and Joncherolles SNCF depots.