How long can the axle be used? Generally speaking, its normal life is about 60,000 to 80,000 kilometers. Within this range, the bearing may start to make louder noises due to long-term rotation wear. Although there is no strict standard for bearing damage, we can judge whether it is a problem by the change in noise.
How to judge whether there is a problem with the axle? If you find that the noise in the cockpit is louder than usual when gliding, accompanied by a buzzing sound, it may be a problem with the bearing. This noise will become more obvious as the speed increases. In this case, first check whether it is a problem with the tire. If the tire is ruled out, it is likely to be a problem with the bearing.
Regarding whether the axle can be maintained regularly, for cars such as family sedans and SUVs, bearings are generally not able to be maintained regularly. Because the process of disassembly and maintenance is too troublesome, it is more convenient to replace it directly with a new one. However, if it is an engineering vehicle, off-road vehicle or truck, they use tapered bearings, then regular maintenance is still possible.
To summarize, if you hear a buzzing noise while driving, especially when coasting (when the transmission basically doesn't work), and you have ruled out tire noise, then it is basically certain that there is a problem with the axle.
