Meanwhile, the Punggol LRT line was awarded to Singapore Bus Service (present-day SBS Transit) on 20 May 1999.

The system was handed over to SBS Transit on 1 December that year, which conducted more trial runs and staff training before the opening of the East Loop on 29 January 2005.

[13] On 31 October 2012, the Land Transport Authority announced that by 2016 the Sengkang and Punggol LRT lines would be upgraded to two-car trains, doubling the passenger capacity.

[15] On 15 December 2017, the Land Transport Authority said there will be limited services on parts of the Sengkang-Punggol LRT (SPLRT) on most Sundays from 14 January 2018 to 25 February that year, to facilitate renewal and improvement works from (except 18 February as it is a Chinese New Year holiday).

[16][17][18] On 22nd of that month, SBS Transit said the arrangement is expected to continue until end April that year.

[19][20] From 27 May to 7 October that year, limited services on Sundays will continue on the Sengkang-Punggol LRT (SPLRT).

[21][22] On 5 February 2021, the Land Transport Authority announced that it has purchased 17 two-car trains for the Punggol and Sengkang LRT systems.

An initial 41 trainsets entered service in 2003 under C810, with an additional 16 train sets were delivered in 2016 under C810A, bearing only minor exterior differences from its predecessor.

The procurement of a further 34 vehicles (17 two-car trains) to boost the capacity of the Sengkang-Punggol LRT was announced by the Land Transport Authority in February 2021.