TC reported BCU suspension fault at front M1 car. ~~~~~ 1514 TC reported BCU suspension fault.  1514 FC BCU suspension fault & BCU PWM fault. ER D/L found no abnormalities. #1514 replaced BCU. Function check - OK. No air leak from brake frame. All connectors & transdusers well secured. Brake cyclic test - OK. Monitored for 3 hrs - OK.  Wong/Kiran 44865 #1514 BCU S/N : OLD : 1825083 NEW : 1827113