Manufacturer Part Number: 64118369807. BMW E46 X3 E83 Z3 M3 E36 316I 318I 320I 323I. 54347193448 Convertible Top Hydraulic Roof Pump Motor & Bracket for BMW Z4 E85. 54347193448 Roof Pump Motor Unit For BMW Z4 E85 Cabriolet Convertible Petrol.