vinkodex.
Known fault

Rear air suspension: the back sinks overnight, overworked compressor

Typically above 100,000 km. It does not show up on every car.

expensive

severity

above 100,000 km

mileage

3

sources

3 sources next to the write-up.

The fault

How you spot it

On the E70/F15 (and the air sprung G05) X5 the self levelling air spring on the rear axle starts to leak over time. The characteristic picture: after standing for a long time the back sits lower than the nose; on startup the compressor runs for minutes, the car comes up, then sinks again hours later. Sinking on one side points more to that corner's air spring or to the valve block, while sinking on both points to the shared supply (compressor, dryer, lines).

A "compressor replacement" on its own often does not fix it: if the air spring keeps leaking, the new pump fails soon too. Air suspension is not fitted to every version, so the equipment list has to be checked separately.

The repair starts with finding the leak (soapy water, ride height sensor, valve block), not with replacing parts blind.

Which model

Who it affects

The card opens the generation, the engine or the transmission.

Generations and models

3 generations.

Checklist

Rear air suspension: the back sinks overnight, overworked compressor

What you would check for this fault. Take it to the car.

Before you buy

Checklist

What you tick stays on this device only.

vinkodex.com · Before you buy it, see what can go wrong.

Sources

How we know

Information, not an expert opinion

We write the descriptions, and we put the source next to them. A person reviews them before they go out. They are still information, not a technical expert opinion.

  • A fault on the list does not mean the car you are looking at has it.
  • A fault missing from the list does not mean the model is fault-free. Write-ups are made model by model. Not all of them are done.
  • You decide whether to buy. This is no substitute for an inspection. That needs a workshop and a history check.
Details in the terms