The consumption of resources is at an alarmingly high level, and there is a high need for resource-efficient alternatives to manufacturing. Remanufacturing is one way to reduce the use of both materials and energy, while still providing products with a like-new condition. This paper aims to define critical areas to assess when applying remanufacturing to original equipment manufacturers (OEMs). The research was conducted by interweaving remanufacturing’s role in a circular economy (CE) with a single case study at a robotic lawn mower OEM. The case study was split into three parts that separately investigated customer demand, product design and economic sustainability, respectively, all in the area of remanufacturing. This paper addressed the research gap in OEM strategy towards a CE with remanufacturing, defining five critical areas to assess when applying remanufacturing to OEMs: customer, product, sustainability (economic, environmental and social), business model, and production system. The findings of the paper could be useful for many OEMs willing to shift to a CE with remanufacturing.