BSEP Enviro500 MMC 12m double-decker buses are mechanically similar to those owned by SMRT Buses - they are powered by the Cummins ISL8.9e5340B engine (8849cc) which is Euro V compliant and fitted with ZF EcoLife 6AP1700B 6-speed automatic transmission.
This New Generation model is an evolution of the original Transbus/Alexander-Dennis Enviro500, which in turn was the direct successor to the Dennis Trident 3 which SBS Transit operates a small fleet. The Enviro500 MMC, Enviro500 and Dennis Trident are very popular models for major public bus operators in Hong Kong.
It is likely that a substantial portion of these BSEP buses, if not all, would be eventually transferred to rival operators and operated under the Government Contracting Model by mid-2016.

- SMB3501L-106-B
- SMB3501L-106
- SMB3501L-972
- SMB3502J-106
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- SMB3504D-106-B
- SMB3504D-106-C
- SMB3504D-106-D
- SMB3504D-106-E
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- SMB3505B-190
- SMB3506Z-190
- SMB3507X-106
- SMB3508T-106
- SMB3508T-106A
- SMB3508T-190-B
- SMB3508T-190
- SMB3509R-106