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 12... Replacing complete lower frame section
2009 BMW 750Li 4.4 3SECTION 54 12... Replacing complete lower frame section
NOTE:
The spare part scope comprises the lower frame section without drives, sliding headlining and glass lid.
Necessary preliminary tasks:
- Remove GLASS SLIDE/TILT SUNROOF LID
- Remove SLIDING HEADLINING
- Remove HEADLINING
- Remove drive units with gearing. See REMOVING DRIVE WITH GEARBOX (FRONT) and REMOVING DRIVE WITH GEARBOX (REAR) .
- Remove GLASS SLIDE/TILT SUNROOF
Installation:
Follow the installation sequence from work steps 5 to 1.
After the operations are completed, the following tasks must be carried out:
- Adjusting GLASS SLIDE/TILT SUNROOF LID
- INITIALIZE glass slide/tilt sunroof
RENDER: 1.0x
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.