Toyota 84210-52050 Back Up Lamp Switch Genuine Oem:Yes, Category 2:Chassis Electrical, Fitment Footnotes:Diag Ref #21, Alternate Item Name:Back Up Lamp Switch, Quantity Needed:1 Brand:Toyota, Fitment Type:Direct Replacement, Superseded Part Number:8421012040, Item Name:Back Up Lamp Switch, Category 1:Electrical Manufacturer Part Number:8421052050, Category 3:Switches, Other Part Number:8421012040, Part Ref# On Diagram:ONLY PART REFERENCE #21 ON THE DIAGRAM I