Why does the car make noise?

[OAshley]

Car noise may be caused by electrical currents inside the vehicle and thermal expansion/contraction sounds in the engine compartment, which are normal phenomena. Here are some solutions regarding abnormal noises after the car is turned off: Observing the cause without turning off the engine: You can try not to turn off the engine immediately after parking and wait for a while. If the noise persists after this method, it should be checked. Engine metal components causing the noise: If there is no noise after waiting a while before turning off the engine, it indicates that the sound is caused by friction between some metal component joints in the engine due to cooling contraction, which is normal and does not require maintenance. Normal electrical current situation: If there are no other abnormalities with the car, it is a normal phenomenon and does not require maintenance.