The Volvo B12BLE is a low-entry city and suburban bus chassis launched in 2001 with a rear-mounted transverse engine.

It superseded the Volvo B10BLE and is used as a base for single-decker buses largely in Continental Europe and the Asia-Pacific regions.

Most of the B12BLE chassis that go to Australia are bodied by Australian companies such as Custom Coaches, Volgren, and Bustech.

STA placed an order for 80 B12BLEA articulated buses, and they were assembled with Custom Coaches bodywork.

The buses are powered by the 12-litre Volvo DH12 diesel engine with 6-speed ZF 6HP602C and 6HP604C automatic transmission.

The Volgren bodied buses were mostly seen running the high capacity Metrobus services.

The buses are bodied by ComfortDelGro Engineering Corporation and are speed-limited for safety reasons.