Why Does the Audi Make Abnormal Noise When Accelerating at Low Speed?

[StTravis]

If there is abnormal noise when accelerating, it may be due to excessive clearance in components like the drive shaft, poor lubrication, or improper assembly during maintenance, which causes friction and noise when high torque is output. Distinguishing whether the noise is normal: When a car is operating, vibrations from various mechanisms produce sounds of different natures. However, the presence of noise does not necessarily indicate a fault. To avoid unnecessary disassembly, it is essential to first distinguish between normal and abnormal noises. Normal noises: These include the normal vibration sounds from various system components (such as engine surface noise), gear impact sounds during gear shifting, intake and exhaust sounds, and gear meshing noises. Abnormal noises: Examples include the arcing sound from high-voltage electricity leakage and the slight rattling sound from loose rolling bearings.