Steering column
Connects the steering wheel to the steering gear.
Between the cabin steering wheel and steering rack.
Shaft sections and joints transmit rotation; column structure also incorporates safety-related design.
A guided shaft carrying your steering command.
Play, binding or abnormal noise needs inspection of joints, mounts and the connected rack.
Joints and boots are inspected for play, damage and leakage; electrical assistance has no universal preventive replacement interval.
A tie-rod or boot service differs from a complete assisted rack. Alignment and electronic calibration may add work.
BMW column adjustment motors and the mechanical steering path are different parts of the assembly.
BMW steering systems as fitted; assistance type and rear-steering availability depend on chassis.