Remanufacturing is an ultimate form of recycling by manufacturing “good as new” products from used products. Through remanufacturing, materials and energy can be saved and less waste is produced. However, at present, the application of remanufacturing is common only in specific industrial fields and geographic areas. This paper describes challenges identified and discusses how collaboration and networking of companies can support the implementation of remanufacturing. In addition to cases described in literature, the study uses information collected from Finnish case companies operating in remanufacturing.