Regarding your question, if there is abnormal noise in the chassis during emergency refueling or braking, check the engine bracket, which may be the impact caused by the damage of a bracket; In summer, the driving water temperature will be higher. When the water temperature rises to a certain temperature, the electronic fan will start to dissipate heat, so it is normal that the water temperature will drop rapidly under the action of the cooling fan. When braking while driving, the steering wheel jitter is mainly caused by the serious wear of the brake disc. Check the brake disc for wear and runout. I hope my answer is helpful to you.