Siemens C651
Upgrading works has begun since early 2016, beginning with train set 217/218. Trains will also include STARiS 2.0, a system showing information about the train's route. The first upgraded train set is expected to be tested before starting to run in the second half of 2018. In late August 2016, 2 model train cars have been built by SRE, showing that the project is unaffected by the pausing of the end-of-life upgrades for the 66 C151 train sets. As of the second half of 2018, sets 217/218 and 227/228 have been upgraded and are being tested. It will also be the third and final rolling stock to be painted in SMRT's style while newer rolling stock starting from the upcoming C151C trains will be painted in LTA's style.