The Volvo B9TL is a low-floor double-decker bus built by Volvo from 2002 until 2018. It superseded the Volvo Super Olympian and the Volvo B7TL. The 2-axle version has been superseded by the Volvo B5TL in 2014 and the 3-axle version has been superseded by the Volvo B8L in 2018. Chassis The Volvo B9TL chassis shared the same design of the Volvo B7TL. The key difference from both its predecessor, the Volvo Super Olympian and Volvo B7TL, was a new 9.3-litre engine originally designed by Renault. The radiator was located at the rear offside, similar to the smaller B7TL. The front module design was shared with other low-floor bus chassis built by Volvo, and independent suspension is fitted at the front axle (replaced by conventional front suspension after some years of production). The B9TL was initially offered in three-axle format, and the two-axle variant was added in 2006 to replace the B7TL. The driveline comprises a Volvo D9A Euro III engine (rated at 300 bhp or 340 bhp), which was later replaced by the Volvo D9B Euro IV/V/EEV engine (using selective catalytic reduction technology; two versions were offered - the D9B260 rated at 260 bhp for two-axle version, and a higher powered D9B310, rated at 310 bhp, for three-axle version), and coupled to a ZF 5/6-speed gearbox. Volvo also offered the Voith four-speed gearbox as an alternative gearbox option. The front wheels of the three-axle B9TL are usually supplied by Alcoa, but some buses (including the three prototypes) had all their wheels supplied by Alcoa. There were rumours that the Euro III version B9TL that was once planned to being equipped with a German made MAN D2866 series engines with Voith DIWA 864.3E gearbox for Berlin. But since both sides are point out there have Difficulties in Mechanical Configuration, the B9TL version with MAN engine has been completely shelved permanently. This is fully explained that they have originally being expecting for a version to Berlin before they getting the final result that showed fail at the end. Asia Pacific Hong Kong Kowloon Motor Bus A Volvo B9TL prototype with a Volgren CR223LD body was delivered to Hong Kong in July 2003 for Kowloon Motor Bus (KMB) as a demonstrator for the Eco-Driveline concept. It was put into service in April 2004 and registered as MF5119. In early 2004, a Volvo B9TL prototype with a facelifted version of the TransBus Enviro500