What causes abnormal noise when the Corolla is driving?

[LeMaci]

Reasons for abnormal noise during vehicle driving: deformed exhaust pipe; engine abnormality. The following are specific introductions to the reasons: Deformed exhaust pipe: Generally, the exhaust pipe of front-engine models extends from the bottom of the car to the rear. Driving on rough roads or hitting the chassis can easily cause the exhaust pipe to dent and deform. A deformed exhaust pipe increases exhaust resistance, thus causing abnormal noise. Engine abnormality: Mainly caused by excessive wear of some parts or improper assembly and adjustment. Some abnormal noises can still be predicted, while engine abnormal noise may lead to accidental damage. Therefore, when the engine makes abnormal noise, it should be repaired in time to prevent the fault from expanding.