TC reported intermittent obstacle detected at car 1653 B4 door.Staff(KRJ) checked and confirmed noobstruction but door was slow in closing. ~~~~~ TC reported intermittent obstacle detected at car 1653 B4 door.  Staff(KRJ) checked and confirmed no obstruction but door was slow in closing.  1653 B4 door no fc, other  car no fault code Mating:63.2    Push/pull-10kg Check guide rail,j rail No fod Door timing open/closed -within criteria Check DLS-red mark ok Check DLD-rubber cushion intact ok, function ok Dcs to plate:15.3 Service/clean B4 door guide rail/ Jrail Push/pull 8kg Check and found B4 door RHS door wobble. LHS ok no wobble Remove door found B4 RHS Door main roller damage. Replace 2 main door roller Push/pull :5.3~5.5kg Mating:63 Door timing:within criteria Door cycling few times ok Done by Zulq, Haslan, Asruddin 44549