A magnetic hub plug apparatus for sealing a wheel hub and detecting wheel bearing failure includes a plug body having a plug outer side, a plug inner side, and a plug edge. A seal ring has a proximal perimeter coupled to the plug inner side, a distal perimeter, and a seal sidewall extending from the proximal perimeter to the distal perimeter. The seal ring is configured to sealingly fit within a wheel hub cap. A magnet extension is coupled to the seal ring. The magnet extension extends from the seal sidewall and dips within an oil reservoir of the wheel hub cap with each rotation. A magnet insert is coupled within the magnet extension to collect particles from a faulty wheel bearing. A plug grip is coupled to the plug body and extends from the plug outer side.