This study was requested by the European Parliament’s Committee on Internal Market and Consumer Protection (IMCO) as part of the Parliament’s general commitment to improving the quality of EU legislation, and in particular in undertaking to carry out impact assessments of its own substantial amendments when it considers it appropriate and necessary for the legislative process. The aim of this study is to conduct an ex-ante impact assessment of proposed substantial amendments from the IMCO and JURI Committees which would introduce a commercial lifespan guarantee. The impacts of these amendments have been analysed through the development of specific policy options. Two non-legislative options, implying that none of the amendments are implemented, are first assessed: an Option zero and a soft law approach (Option 1). Three distinct legislative options are also defined, by integrating specific aspects of the amendments: Option 2 (Subjective duration of lifespan), Option 3 (Normal duration of lifespan) and Option 4 (Binding technical standards for the determination of the lifespan) For each legislative option, two sub-options are developed by considering liability solely on the manufacturer (2a, 3a and 4a), or joint liability with the trader (2b, 3b and 4b). The key findings of the impact assessment reveal that the preferred options are Options 2 and 4. The former is certainly less ambitious than the latter and would result in less benefit overall, but it would also involve less cost and, contrary to Option 4, could be implemented within a relatively short period of time.