This research explores the influence of discourse power on policy change in the Mexican electricity sector, using the Advocacy Coalition Framework (ACF). Drawing on Discourse Network Analysis, it examines the discursive dynamics and power relations between competing advocacy coalitions from 1994 to 2018. This 24-year period encompasses three significant reform proposals that aimed to liberalise Mexico’s electricity generation sector, representing major potential policy changes. Specifically, the study tests the second policy change hypothesis proposed by the ACF, which suggests that major policy change is unlikely as long as the advocacy coalition defending the status quo remains in power. To operationalise the notion of which coalition is in power, the study employs Discourse Network Analysis to examine the discursive power of each coalition. This allows an exploration of how the interplay between coalition discursive power and the extent of belief differences shape policy outcomes. The findings align with the ACF’s second hypothesis on policy change. They also suggest the potential for enhancing the ACF by incorporating a nuanced understanding of the multiple dimensions of power, with a particular emphasis on the discursive influence of advocacy coalitions.