At the end of the 1970s, the first plans have been drawn up for passenger carriages with increased comfort (127A and 127Aa) which took the form of the non-air-conditioned UIC-Z2.

[7] On the 31 December 1997 the company had completed their first 6 units of the 152A type and not long after the open saloon second class carriages 154A have been built.

On the 4 October 2010, due to a lateness in delivery a three-page agreement was signed between the manufacturer, client and the insurance company.

This agreed to give back to PKP Intercity zl 21 million, in which the delivery ended at 14 carriages instead of the 17 ordered, the client had cancelled the 157A.

H. Cegielski suggested 164A, 165A, 166A and 167A, passenger carriages with a maximum speed of 200 km/h (124 mph) which agree with the UIC for the type Z1.

H. Cegielski began the deliveries at the beginning of January 2014 delivering four units of 166A and two 167A (later registered as 156A variation).

Another 3 167A passenger carriages were successfully delivered in July 2014, which made the second depot for the PKP Intercity Przemysław.