Your car(or motor vehicle) doesn't actually belong to you it can be sold by a friend or family member with no consequence to them. Leaving you with the trials and hardship of trying to buy it back from the person it was sold to because for whatever reason they actually get to own it.

(This is a new cliche I've seen in a few tv shows. Their friends/family just sell their car like it's owned by the people that know that person instead of the person themselves. I don't know where the hell tv show writers came up with this one.)