F11 rear suspension dropped

Discussion in '5 Series' started by Davel, Sep 20, 2019.

  1. Davel
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    Davel

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    Hi all got my car booked in as looks like the Air suspension has dropped as back of car gone very low. Is there a fuse I can check to see if it’s that ? Car has felt a bit bumpy a couple of mornings before seeming ok..this morning it collapsed at the back completely...
     
  2. snrbrtsn
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    snrbrtsn WARLORD Site Supporter

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    There’s a couple common troubled areas

    Airbags are known to perish and cars drop overnight or if left
    This can show one day and not the next depending on where the roll of the bag sits on the lower mount
    Ordinarily a first check, either visually or soapy water will identify

    Air compressors are known to have sticky/worn valves
    This will show most often when car is switched of

    Less common is the level sensors
    As these are sited in the splash zone it’s not common for these to become sticky albeit they are resilient and relatively simply so seldom cause problems..

    If I was to guess with remote diagnosis I’d suggest your compressor is at fault as the description suggests both sides..
    Albeit it’s not uncommon for the bags to leak and go unnoticed, overworking the compressor and latterly causing the wear.

    If not diy competent (a relatively simple fix) best course of action is as you mention book it in albeit any garage can correctly diagnose and repair aftermarket parts will be much cheaper, available from Arnott and Aerosus

    There is a thread from @Peter who had similar fate
     
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  3. Davel
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    Davel

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    Thanks for the info, just checked the car today and can hear buzzing from the back, both sides completely dropped really low,looks like I’m a boy racer again....garage should hopefully sort it..thx dave
     
  4. Peter
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    Peter WARLORD Site Supporter

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    When you say 'buzzing', do you mean the compressor is not running, but simply a buzzing sound?

    Peter
     
  5. Davel
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    Davel

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    Not sure about the compressor..just heard a buzzing from the back but car is still dropped very low..is the buzzing the compressor trying to work?
     
  6. Peter
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    Peter WARLORD Site Supporter

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    That's what I'm wondering. If the compressor is working, it is more a motor (pumping) sound. Plus you'd likely hear air hissing out of an air spring or air line, if the car won't rise.

    Peter
     

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