This thesis was conducted in collaboration with Volvo Cars, a car company founded in 1927 in Sweden. The automotive industry aims to make the production of its vehicles more energy-efficient and sustainable. Volvo Cars has publicly stated that they want to become a climate-neutral company by 2040. A big step in that direction is eliminating the ovens used for curing adhesive in different applications, one being for Hang-on Parts. This study investigates alternative, more energy-efficient methods for joining the inner and outer panels of hoods and tailgates. The focus is on conceiving different concepts and design solutions that the company can use for further investigations. The project was divided into different stages: a literature review, benchmarking, concept generation, and evaluation. A systematic literature review was performed with databases and keywords. The keywords used in the search were “aluminum,” “joining,” “bonding,” “sheet metal,” “automotive,” “energy effective,” “hemming,” and “adhesive.” Benchmarking was performed by collecting data from different sources and investigating Original Equipment Manufacturers (OEMs). The concept was generated by analyzing the literature review, brainstorming, and discussions. The concepts were evaluated by comparing their properties in a Pugh Matrix and using internal qualitative analysis and assessment. The most favorable concepts are induction curing, 2K adhesive, and mechanical indentations, which should be the most suitable for further evaluation regarding alternative joining methods. These concepts represent the most favorable balance between feasibility, integration potential, and performance, pending further validation and testing.