First introduced in late 2010, these buses were powered by the Volvo D9B310 EC06B engine (9,364cc) which is Euro V compliant with the use of Selective Catalytic Reduction (SCR) technology, requiring the use of Adblue. The initial 150 units (Batch One) and the final 415 units (Batch Five) were fitted with the new generation 6-speed ZF EcoLife 6AP 1403B automatic transmission. The second and third delivery of 300 and 550 units respectively (Batch Two, Three and Four) were fitted with 4-speed Voith D864.5 automatic transmission.
Air-conditioning was initially supplied by Eberspächer Sütrak for Batch One to Three, and its R488 model was a custom product newly designed to meet SBS Transit's requirements. Batch Four and Five units had their air-conditioning supplied by Denso of Japan. The B9TL WEG2s received either Hanover Displays EDS (Batch One, Batch Two, SBS3189X, and later Batch Four) or LECIP EDS (Batch Three, early Batch Four, and Batch Five). From Batch Three onwards, Wright-bodied B9TLs registered in the 3000s range feature a full low-floor configuration on the lower deck. Batch Five units are registered from SBS1Z onwards had revised interior features including a straight staircase and headrests on side-facing priority seats (similar to the Volgren-bodied B10TLs).
With orders totaling up to 1,415 B9TL WEG2 buses for SBS Transit and expected to be fully delivered by 2017, this makes SBS Transit one of the largest Volvo B9TL operators in the world.
In December 2015, Land Transport Authority bought out SBS Transit's contract for any remaining B9TL WEG2s yet to be delivered. Together with the BSEP fleet, they are reassigned to other operators in preparation for the Government Contracting Model (GCM/BCM).
Batch 1465 photos
Batch 295 photos
Batch 3536 photos
Batch 4626 photos
Batch 59 photos
SG-Registered (GCM)46 photos