Located on the power steering fluid tank, it informs the on-board computer when the level is insufficient,
For E60 & E61 with dynamic drive system up to ->03/07:
- 525 d M57N
- 525 i M54 & N52
- 530 d M57N & M57N2
- 530 i M54 (E60 only)
- 530 i N52
- 535 d M57N
- 540 i N62N (E60 only)
- 545 i N62
- 540 i N62N
For E60 LCI & E61 LCI with dynamic drive system up to ->03/07:
- 523 i N52N
- 525 d M57N2
- 525 i N52N & N53
- 530 d M57N2
- 530 i N52N & N53
- 535d M57N2
- 540 i N62N (E60 only)
- 550 i N62N
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