BMW AG has bought a 15.16% stake in carbon-fibre maker SGL Carbon. The move strengthens the luxury car maker’s focus on lightweight construction and use of carbon fibre-reinforced plastics (CFRP) in automobile manufacture, according to BMW. BMW and SGL already operate a successful joint venture making carbon fibre in the US. “Lightweight construction will play an increasingly important role in the automobile industry in the future. Our stake-holding in the SGL Group is a logical step that will further strengthen our successful cooperation,” said Friedrich Eichiner, BMW board member responsible for finance, speaking in Munich. The German car maker said it is not disclosing any financial details of the transaction, and added that currently it has no plans to seek a seat on SGL Carbon’s supervisory board. BMW and SGL’s joint venture SGL Automotive Carbon Fibers (51% owned by SGL and 49% by BMW) said it has a state-of-the-art carbon fibre plant in Moses Lake, Washington. The plant plays an important part in the two companies’ strategy to automate the production of ultra-light CFRPs for use in future vehicle concepts. The carbon fibre produced in Moses Lake is being processed at BMW facilities in Wackersdorf and Landshut, Germany. Wackersdorf produces textile fabrics made from carbon fibres, which are then being processed at the BMW plant in Landshut to make lightweight CFRP body components for the BMW i3 and BMW i8.