If your friend got a DUI in your car, can your car get inpounded?

That can happen. Typically on a DUI plea or conviction the Court orders that the car the defendant was driving be impounded for ten days as that is required under the law. Most judges will either waive that requirement or allow another car to be impounded. Impounded means not used for ten days. The impoundment of the car can be a company comes out and puts a lock on the car. If the car was impounded (literally) during the arrest then there could be other issues such as drugs found in the car or some other reason the car was impounded.