Can a lien on car you perchused full in cash but dealer has a lien on the car still be reposessed?

If you purchased the car in full with cash then there shouldn't be a lien. Look at your paperwork to make sure it says "Paid In Full" if it does the dealer has no right to repossess a paid in full vehicle. A lien is where you are making payments for a vehicle and the vehicle is being used a collateral until the vehicle is paid off.