1. If the car loan is overdue, the guarantee company can seize the car after finding it and immediately apply to the court for guarantee measures. This is the legal way. 2. If the guarantee company fails to apply for court preservation after impounding the car, it may be suspected of violating the law, and it can be handled by the police. However, the behavior of the guarantee company is just an ordinary illegal act that infringes the ownership of the car, not robbery. However, if the guarantee contract stipulates that the guarantee company temporarily suspends the right of the vehicle, or the ownership of the vehicle does not belong to the driver, it is not illegal for the guarantee company to detain the vehicle in accordance with the contract and legal provisions. 3. To sum up, in any case, the guarantee company can temporarily detain the vehicles in loans overdue and handle the economic disputes with the owners through legal channels. The guarantee company realizes the relief of self-rights through its own strength, or has some improper methods, but it never involves crime.