Do car wheel bearings need lubrication?

Automobile wheel bearings usually do not need to be lubricated. This is because in the design of modern cars, the wheel bearings are already filled with paste grease, which can remain sealed and durable during the life cycle of the bearings and will not leak due to long-term use. Therefore, unless the grease is lost, it is not necessary to add lubricants regularly. For some special-purpose vehicles, such as semi-trailers and trucks, due to their high frequency of use, regular inspections and lubrication may be required according to the maintenance manual.