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Systemic lupus erythematosus (SLE) is a complex multisystem, autoimmune disorder. The disease involves multiple inflammatory and immune pathways, posing several treatment challenges. The role of B cells in the pathogenesis and disease activity of SLE is well described, and treatments targeting B cells are now well established. Despite advances in therapeutics for SLE, the clinical course of SLE can be associated with significant morbidity and mortality. For many individuals, the management of SLE requires lifelong immunosuppression. Chimeric antigen receptor (CAR) T cell therapy is an emerging treatment for haematological malignancies that uses CAR T cells to target CD19+ B lymphocytes. CAR T cell therapy has shown promising results in murine models of SLE, and a case report and subsequent case series in people with SLE reporting drug-free remission following CAR T cell therapy against CD19+ B cells have recently been published. This review discusses CAR T cell therapy, comparing it with established B cell depletion therapies, such as rituximab, and exploring its safety, limitations and promise in the management of patients with SLE. [ABSTRACT FROM AUTHOR]