Pax feedback to staff tap that Rear DT car B3 door did not open for 3 stations. SM(BSH) checked and feedback that train door is able to open and close but is je rky when closing. Video has been taken and sent to duty CC p ~~~~~ Pax feedback to staff tap that Rear DT c     #3612-B3 door-LHS found wobbling when doing the push/pull resistance.Change 2 pcs of bearing.All check done within criteria.Cleaning done and no FOD found.Do door function test-ok.Replace door isolation device on #3612-B3 door. New s/n: C151BIL18Y006 Old s/n: C151BIL14Y081 Not: 2447342 raise to CSC Done by Haslan/Arsuddin. 23/12/22