bmw m3 6 speed manual, We recently encountered a shifting issue with our 2001 BMW M3, which came equipped with a 6 speed SMG or Sequential Manual Gearbox, and found it to be a bad hydraulic pump. Because of the costs of fixing the issue, and due to readily supply of manual M3 parts we had in house from previous projects, we opted to go a different route and convert this specimen to the much sought after 6 speed manual gear box.
