Increased consumer expectations and diverse consumer needs have led to consumers turning to the internet as a communication medium to share their positive and negative experiences, feelings, and level of satisfaction with others. The primary objective of this study was to explore the nature of user-generated content, in terms of consumer complaint and compliment behaviour related to the seven OEM brands in South Africa. The study focused on the South African automotive industry, and the consumer behaviour associated with post-purchase responses on an online consumer advocacy platform, called Hellopeter.com. A qualitative research design, making use of a content analysis, was employed. In total, 185 user-generated content items were collected from Hellopeter.com for the data-collection period, and 176 complaints and 9 compliments were analysed. The results of this study indicated that the nature of user-generated content related to the seven OEM brands in South Africa could be categorised according to eight broad themes: seven themes were specifically related to consumer complaint behaviour, while one theme was associated with consumer compliment behaviour. The top consumer complaints and compliments related to the OEM brands on Hellopeter.com were also determined. The nature of the user-generated content showed various similarities to that of the general services industry but proved to be unique to the automotive industry. Specific recommendations were made and included that open communication channels and proper feedback systems should be put in place to satisfy consumer needs, and that the findings of the study should be used as a benchmark to monitor and improve consumer complaint and compliment behaviour, as a means to create loyal consumers / Business Management / M. Com (Business Management)