The maximum that other repair shops can offer you is to dilute the old waste liquid with oil and pour it over again.
The magnetic particles in it have already been destroyed and degraded. Damping (damping of vibrations), such "restored" shock absorbers will no longer be able to produce. Be careful, don't let yourself be fooled.
There are also new shock absorbers on the market with fake electronics, which are falsely advertised as being made in the United States or Europe. There is no magneto-rheological fluid inside this shock absorber. A conventional shock absorber without stiffness adjustment. And a wire is brought out, which deceives the computer, as if an adjustment is taking place. In certain modes, the computer understands that the system is malfunctioning and puts the system into emergency mode, flashing a warning about a suspension malfunction on the scoreboard. Be careful, the price of such tricks is 100 USD,
and they sell them four to five times more expensive.
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