Train doors at car 3644 were not provenclosed. TC recycled train doors once - ok. Staff(MSP) checke d and confirmed train door at car 3644 'B1' did not opened. Staff(MSP) subsequently isolated car 3644 'B1' door in close ~~~~~ Train doors at car 3644 were not proven     Check the above reported #3644-B1 (LHS) door wobbling. Due to roller damage.Replaced both roller and function check and all checked within criteria ok.Door open/close timing and static test ok. Done by Saini/Haslan. 22/03/23