Hydroamplifier fluid does not require replacement and is designed for the entire lifetime of the vehicle. If there are leaks in the system, there is a leak in the steering control or the efficiency of the hydro-amplifier has decreased.
If the bap is warm from time to time, you can use the flashlight to determine the level of the liquid.
It is necessary to use the liquid recommended by the manufacturer for the millet. Otherwise, the entire system might be down.
