Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
54 34... Topping Up/Extracting Fluid, Checking Fluid Level
- The hydraulic fluid does not have to be changed because the system is filled with life-time fluid.
- Only the approved hydraulic fluid may be used in the event of leaks.
- All hydraulic cylinders must be completely extended.
- The hydraulic system is automatically bled by repeated actuation.
Necessary preliminary tasks:
- Remove hydraulic control unit (hydraulic system closed/do not disconnect lines). Refer to 54 34 005 Removing And Installing/Replacing Hydraulic Control Unit For Convertible Top Drive .
Protect components and work area with suitable materials (e.g. cloths).
Use only Aral Vitamol ZH-M fluid (refer to BMW Parts Service).
Do not allow fluid to flow over components.
Checking fluid level:
- Convertible top closed
- Close convertible top compartment lid
- To release, remove hydraulic control unit without lines from foam inlay.
Fluid level must be within the markings convertible top is closed and the control unit is horizontal.
- Maximum
- Minimum
Topping up fluid:
- Convertible top closed
- Close convertible top compartment lid
- To release, remove hydraulic control unit without lines from foam inlay.
- Total filling quantity: 450 - 500 ml
Open oil filler plug.
Tightening torque: see 54 34 11AZ in 54 34 MOTOR-DRIVEN CONVERTIBLE TOP (ELECTRICAL COMPONENTS) .
Set down hydraulic control unit as pictured and pour in fluid quantity from fluid bottle (use a funnel if necessary).
Check fluid level in the meantime.
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.