A bad motor may cause the RC car to be underpowered, slow moving, or even unable to start. Sometimes it will also have strange noise or overheat phenomenon, need to check and replace in time.

Arm material affects durability and weight. Metal swing arms are stronger but heavier; plastic swing arms are lighter but more prone to wear and tear.

Battery pack is a sign of internal damage, continued use may cause short circuit, explosion and other dangers, you should immediately stop using and replace the battery with a new one.

A shock absorber that is too soft will cause the body to shake and affect handling; one that is too hard may reduce comfort and increase vibration.

A broken servo may cause the RC car steering failure, the steering wheel can not be accurately back to the center, or even the car will be out of control and spinning. You need to check and replace the servo in time.