Weld cracks play a significant role to fatigue failure, making the accurate modeling of both spot welds and seam welds crucial for structural durability. In the automotive industry, various methods, such as nominal stress or force-based approaches, have been employed for weld fatigue analysis. Nevertheless, incorporating local stress directly yields more precise results. However, this method is based on very fine meshes for the detailed examination of local notch stress, which leads to substantial computational demands. To address this challenge, the superelement approach is introduced. This method involves generating the superelement welds, positioning them within the full assembly, recovering stress components of the notch and calculating fatigue life. For seam welds, accurate placement along the weld line is particularly challenging. A constant radius of the weld describes the notch geometry and von-Mises stress is used as the fatigue criterion. This work involves the analysis of component with welds, providing a thorough description of the entire process and the challenges faced. Comparisons between the superelement welds and those with detailed geometry are also presented to evaluate the method and highlight its advantages.