FBW 91U EU4A

The FBW 91U EU4A has a luggage compartment, which is located directly behind the rear exit door and has a partition with a sliding door with glass panes.

The ZVB buses were also equipped with split dispenser in front of the rear wheels in order to achieve better grip on snow and ice.

These trailers were used already from the predecessor model the Saurer 5 DUK.

With the purchase in 1975, together with the orange buses, which were held in VST unit paintwork, new ordered APE 4.80 trailers got also the orange paintwork.

An FBW 91U EU4A of the ZVB is located in the Zug depot technology history (German: Zuger Depot Technikgeschichte).