High Quality Content by WIKIPEDIA articles! The Volvo B10M is a popular mid-engined bus and coach chassis built by Volvo between 1978 and 2001. It was built as the successor of the B58 and was equipped with a 9.6-litre horizontally-mounted Volvo THD100/THD101/THD102/THD103/THD104/DH10A diesel engine mounted under the floor, near the middle of the chassis, slightly toward the front. An articulated version under the model name Volvo B10MA was also offered.