Component of the peroxisomal protein import machinery. Together with PEX1, mediates the ATP-dependent relocation and recycling of the peroxisomal targeting signal-1 (PTS1) import receptor PEX5 from the peroxisomal membrane to the cytosol, where it is then available for another round of protein import into the organelle. Interacts with PEX1; forms a high-molecular-mass heterooligomer in the cytosol. Interacts with PEX15; anchors PEX1-PEX6 heterooligomers to the peroxisomal membrane and mediates their association with the peroxisomal importomer. Shuttles between the cytoplasm and the peroxisomal membrane (PubMed:12808025). AAA-cassette D1 is required for interaction with PEX1. ATP-binding in AAA-cassette D1 is required for attachment to PEX15. ATP-binding and hydrolysis in AAA-cassette D2 is required for release from PEX15 and proper function in PEX5 dislocation. Present with 1630 molecules/cell in log phase SD medium. Belongs to the AAA ATPase family.