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Caesar

Guide to E61 Air Suspension repairs?

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Hi,

The 2004 E61 passenger side rear is sitting lower than the driver's side and the compressor is running immediately after parking up.

I'm assuming it's a leaking airbag.

I've bought a Haynes manual, but guess what - there are no instructions for the air suspension as they believe it to be a specialist fix!

 

Can anyone point me to some guidance on how to check which component's failed and then how to replace it please? 

 

Thanks.

 

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Air bag is a 20 minute swap, dead easy.

Mine had a split bag so purchased a good used Gen BMW one rather than a cheap brand new one. It seems quality ones are £160 new which I didn't fancy paying but more than happy with my £60 used item.

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Jacked up the car, removed rear wheels and the airbags seem to be in good condition.

 

However the inlet pipe to the compressor was completely sheared off so will replace tomorrow with something a bit more durable.

I'm not convinced that this on its own would lead to it sagging on the near side only though...

 

Is there a way of checking if the airbag's actually leaking?

 

Cheers.

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On 7/26/2016 at 9:45 PM, Caesar said:

Jacked up the car, removed rear wheels and the airbags seem to be in good condition.

 

However the inlet pipe to the compressor was completely sheared off so will replace tomorrow with something a bit more durable.

I'm not convinced that this on its own would lead to it sagging on the near side only though...

 

Is there a way of checking if the airbag's actually leaking?

 

Cheers.

The inlet pipe has a little filter on the other end of it to stop dust etc getting into the compressor and as the pipe has split I would say that your compressor has failed and can no longer reach a high enough pressure to lift the car to the required level. Buy a new compressor and replace the pipe and filter. https://aerosus.co.uk/bmw/5-series/e61.html

 

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Anyone buying a used E61 ought to replace the pipe that supplies the compressor if they want to maximise the life of the compressor. A cheap bit of fuel hose will do the trick and save £250.. I think BMW were trying to prevent vibrations from the compressor being heard in the car so made the pipe out of a natural rubber that easily perishes, bless them...

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Anyone buying a used E61 ought to replace the pipe that supplies the compressor if they want to maximise the life of the compressor. A cheap bit of fuel hose will do the trick and save £250.. I think BMW were trying to prevent vibrations from the compressor being heard in the car so made the pipe out of a natural rubber that easily perishes, bless them...

Sounds good, is it an easy fix? any write up?

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There's also someone's idea of fitting a little cheapo fuel filter on the end of the replaced pipe to reduce the ingress of muck, fluff, dust & custard. Seems a smart trick I really should get onto.

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You need to remove the wheel arch liner on the fuel cap side and you can see the pipe and filter to be replaced and get to the compressor to disconnect the old pipe and reconnect the new pipe. 

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There's also a joint/connector in the pipe about 40cm from the compressor. The damage occurs between the compressor and this joint so you can just replace this section.

I bought a metre of tubing with the same diameter but rated to 90psi so is about twice as thick. For additional protection put a section of hose pipe over the tube where it's in contact with the compressor bracket.

 

The passenger side wheel arch is about 8mm lower than the driver's side, but it has sagged more than this previously. Is 8mm enough to indicate an airbag leak (there's no hissing and the bag looked in pretty good condition)?

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Any links to pipe purchased? or dimensions etc for pipe needed?

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Thanks for the links - this is something I need to check out on mine, as I get an intermittent warning about SLS on the dashboard.

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9 hours ago, kjb1 said:

Any links to pipe purchased? or dimensions etc for pipe needed?

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I found this:

 

Hose

 

or this:

 

Hose

Edited by Dotcom1970

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