TIMS showed Front M1 car 'A4' train doors open operation timeout. Staff (RFP) checked and confirmed Front M1 car 'A4' train doors did not opened. Staff assistedto isolate defective train doors. ~~~~~ TIMS showed Front M1 car 'A4' train door       #1608-A4 door found wobbling.Remove door and found LHS door roller spoil.Replaced roller and check door push/pull resistance,Mating strip,DLS all within cateria.Cleaning done and door functioning test and door static pass all ok. Done by Khalid/Farhan/Haslan. 23/12/22