Following trials of Wright Eclipse bodied Volvo B7LA low-floor articulated single-decker in the summer of 2000, Dublin Bus ordered 20 of them. They have Volvo D7C-290 engine with ZF4HP592 automatic transmission with integral retarder. They also have ABS anti-lock brakes and ECS electronically controlled air suspension. Also front disc brakes and rear S-cam brakes and multiplex wiring.
All were delivered between November & December 2000. All are based at Harristown Garage and can mainly be seen operating Route 4 from Ballymun to St.Vincent's Hospital or peak time Xpresso routes.
Below: AW20 seen in D'Olier Street on route 10 to UCD Belfield on 29 May 2003.