The Subaru / Robin 277-71401-01 Diode Rectifier CP helps regulate electrical current in compatible engine charging systems. This replacement rectifier converts alternating current produced by the charging system into direct current, allowing electrical power to be supplied properly to the battery and other connected components. Proper rectification helps support stable electrical oper... https://www.wholetoolbox.com/subaru-robin-277-71401-01-diode-rectifier-cp/277-71401-01.html