TIMS showed intermittent BCU fault at car 2533. Train performance - ok. ~~~~~ To continue rectification.  2533 ACU replaced & function test - OK. Cut in/out, air leak (0.3 bar/5 min) & brake pressure checked - OK. #2533 ACU S/N :    OLD : 1038/060 NEW : 1038/063  Syukur/Suhairi/Irwan 44235 2533 TIMS showed intermittent BCU fault. Train performance - ok.  2533 ER D/L & found brake slow to release. OPS 20 raised to follow-up.  Hanafi 44235