How do you get a clear title to a car that was repossessed in chapter 7 four years ago but not picked up?

First of all, if the car was not picked up, it was not repossessed. Second of all, you need to check with the attorney that handled the Chap. 7 BK. The bank may have charged it off or forgiven the debt (not likely forgiven) if you want the clear title, the lienholder would still need to be paid off.