The motor does not turn may be loose or damaged connecting wires, or the motor itself may be damaged. You need to check the connecting wire and replace the damaged motor.

The swing arm may be loose or worn out, check and tighten the screws. If the screw is damaged, replace it with a new one.

The rattling sound from the servo may be due to poor mechanical precision of the gear set or improper setting of the control dead zone, the control dead zone needs to be adjusted or the gear set needs to be replaced.

Where is the best place to buy a HBX T10 RC car?

When the wheels are badly worn, it will affect the handling stability and driving efficiency. It is necessary to replace the wheels with new ones in time and choose wear-resistant materials to prolong the service life.