If the chassis of JJRC C8811 RC car is not deformed seriously, you can try to correct it carefully with tools (e.g. wrench, pliers, etc.). For plastic chassis, you can heat it appropriately (pay attention to temperature control to avoid melting) and then mold it. If the deformation is so serious that it cannot be repaired, purchase a suitable new chassis for replacement, and make sure that all parts are in place when installing.