2025-04-212025-04-212025González-Prida, V., Parra Márquez, C., Viveros Gunckel, P., Kristjanpoller Rodríguez, F. y Crespo Márquez, A. (2025). Digital Transformation in Aftersales and Warranty Management: A Review of Advanced Technologies in I4.0. Algorithms, 18, 231. https://doi.org/10.3390/a18040231.1999-4893https://hdl.handle.net/11441/171822© 2025 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license // (This article belongs to the Special Issue Machine Learning Algorithms and Optimization in the Digital Transition (2nd Edition))This research examines how Industry 4.0 technologies such as artificial intelligence (AI), the Internet of Things (IoT), and digital twins (DT) are used in the digital transformation process of warranty management. This research focuses on converting traditional warranty management practices from reactive systems to predictive and proactive ones, improving operational performance and customer experiences. Based on an already established eight-phase framework for warranty management, this paper reviews machine learning (ML), natural language processing (NLP), and predictive analytics, among other advanced technologies, to enhance warranty optimization processes. Best practices in the automotive sector, as well as in the railway and aeronautics industries, have experienced substantial achievements, including optimized resource utilization and savings, together with tailored services. This study describes the limitations of capital investments, labor training requirements, and data protection issues. Therefore, it suggests implementation sequencing and staff education approaches as solutions. In addition to the current evolution of Industry 4.0, this research’s conclusion highlights how digital warranty management advancements optimize resources and reduce costs while adhering to international standards and ethical data practices.application/pdf37 p.engAttribution 4.0 Internationalhttp://creativecommons.org/licenses/by/4.0/AftersalesArtificial intelligenceDigital twinsIndustry 4.0Internet of ThingsPredictive maintenanceServitizationSmart manufacturingWarranty managementinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/openAccess10.3390/a18040231