BMW 730d Front Air Spring Failure — Corner Sag
The self-levelling air suspension on E65/E66 uses air springs at all four corners. Front air springs develop leaks at the rolling lobe rubber or air line connections, causing one corner to sag overnight. An SLS warning light illuminates and the car may be difficult to drive on the bump stops. Replacement springs cost £200-400 each.
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No commonly reported misdiagnoses for this fault yet. If you have replaced a part that did not fix this BMW 7 Series 2002 problem, submit a wrong diagnosis report — it helps other drivers avoid the same costly mistake.
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