What this usually means
X5 rear suspension drop is often air spring leak, compressor weakness or valve block before replacing the whole rear suspension. Ask for leak-test proof and ISTA compressor run-time data.
What to ask the workshop before approving repair
- • Show the diagnostic fault codes.
- • Show photo/video proof of the failed part.
- • Give an itemised quote for parts and labour.
- • Explain why cheaper common fixes were ruled out.
- • Use/confirm: ISTA
- • Use/confirm: Air suspension test rig
This is not a final diagnosis. It is a money-saving checklist before you go workshop.