BMW X3 Service & Repair Manual: Zf rack-and-pinion steering

NOTE: The hydraulic fluid reservoirs are marked on the rim of the reservoir and/or the reservoir cap to show which type of oil can be used: ATF oil or Pentosin CHF oil.

The ZF rack-and-pinion steering has lifetime lubrication and is thus maintenance-free.

For topping up/filling hydraulic system:

POWER STEERING OIL

Suspension

NOTE: Vehicles with AFS/ARS (Dynamic Drive / Active Steering / Active Roll Stabilization) are filled as standard with Pentosin CHF 11S.

In case of repair, the affected steering components must be lubricated with the following grease:

COMPONENT GREASE

Suspension

NOTE: Calypsol D 4024-OK is a sodium-saponified, cold-resistant grease whose lubricity ranges from -30 ºC to +75 ºC.

    Approved hydraulic fluids
    ...

    E24, e28, e32, e34, and e38
    E24, E28 produced prior to 9/87 Pentosin CHF 4548 was used for initial factory filling. For filling up and replacement the following oil is to be ...

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