Denso Direct Drive Starter for Early 1970's Toyota Corolla, Carina, Etc. There are Three OEM Numbers Here That are Very Similar, And Will Interchange for the Most Part. OEM No. 028000-3052 is the "Standard" 16230 (190-016), With the 028000-3840 Including an "R" Wire on the Solenoid (190-016A), and 028000-3920 Including the "R" Wire and a Threaded Hole on the Field Case for a Heat Shield (190-016B). By Putting a "Universal" Solenoid Cap on All, the Numbers Should Be Totally Interchangeable (Heat Shield Not Withstanding).