The frequency of power steering seal replacement depends on several factors, including the age and condition of the vehicle, driving habits, and the environment in which the vehicle is driven.

In general, power steering seals can last for many years without needing to be replaced. However, if you drive in harsh conditions, such as in extreme heat or cold, or if you frequently make sharp turns or drive at high speeds, the power steering seal may wear out more quickly and need to be replaced sooner.

It's a good idea to have your power steering system inspected regularly by a qualified mechanic, and to have any leaks or other issues repaired as soon as they are detected. This can help to prevent further damage to the system and extend the life of the power steering seal.

If you experience any of the symptoms of a failing power steering seal, such as a fluid leak, whining or groaning noises, or stiff steering, it's important to have the vehicle inspected as soon as possible to prevent further damage to the system.