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Old 11-19-2013, 12:51 PM
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E70 rear suspension flat - Sensor/Air Bag ???

Got a 2008 X5 sport 120Km (w/ 7 passenger seating)...came home one evening and the driver side rear suspension was flat...The fender was maybe an inch off the wheel. The car has been sitting for a few days.

Started it up, moved it a few feet, no fault code, the suspension bag didn't inflate, I was trying to hear the compressor or bag filling up but couldn't really tell...

So left it for a few days, then last night I pulled out the fuse/relay...popped it back in, started it up and got the EDC warning...So I then drove it about 50 feet, the suspension started to fill up, and it was back to normal. Shut if off, waiting a few min, started back up and no EDC warning...Checked it this morning and the rear doesn't appear to have deflated...So Im stumped at this point...

Does it sound like a Relay problem, maybe something reset when taking out the relay ? or maybe a pin hole in the suspension air bag and it deflated over a few days, ? I'd prefer to self diagnose and avoid BMW, then I can shop the parts and "maybe" DIY. any help is greatly appreciated
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Old 11-19-2013, 04:42 PM
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Check this thread

http://www.xoutpost.com/bmw-sav-foru...sls-issue.html
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Old 11-19-2013, 05:54 PM
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Thanks it does help a little, but the weird thing with mine is that the car was in the driveway for at least 4 days parked, then it went flat...Last time I drove or even recently I haven't hit any large holes, I don't drive it hard, nothing out of the unusual. It was only one side on the rear that went down...very odd
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Old 11-23-2013, 03:14 PM
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My thinking is your bag is raptured in place where depending on driving, the crack is exposed or not.

Here is what I did:
http://www.xoutpost.com/bmw-sav-foru...nt-x5-e70.html
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Old 11-24-2013, 01:38 AM
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Originally Posted by gregg3gs View Post
My thinking is your bag is raptured in place where depending on driving, the crack is exposed or not.
Yep, just whisked off to meet it's maker.

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Old 11-24-2013, 11:44 AM
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As per gregg3gs's post, this is one of the simplest repairs you can do on your X5. A jack ( and jackstands) and a couple of hand tools is all you need.
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Old 12-16-2013, 03:57 PM
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Thanks for the info guys...I haven't done any repairs to the car yet...I've only driven it a few times, each time I drive it the bladder inflates, and is good for a few days, then deflates...so just doing a few tests in the meantime.

BUT...I just got a "battery low" warning message today...I've noticed around the same time the car first sagged that the battery appeared to be acting up ( Clock would reset and radio stations gone if the car wasn't started for a few days )...

Could a low battery cause the Air suspension to deflate ? or not "keep it up" so to speak ?
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Old 12-16-2013, 05:41 PM
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Quote:
Originally Posted by sbenne11 View Post

BUT...I just got a "battery low" warning message today...I've noticed around the same time the car first sagged that the battery appeared to be acting up ( Clock would reset and radio stations gone if the car wasn't started for a few days )...

Could a low battery cause the Air suspension to deflate ? or not "keep it up" so to speak ?

Interesting observation....

Dont know, I could ome up with a rationale by which a failing battery (ie unable to hold a deep long charge) could allow certain modules to go into an odd mode and lead to leakage.

How old is the battery? If you read up on this, you will see that they can fail in strange ways.
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Old 12-16-2013, 05:51 PM
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Originally Posted by ard View Post
How old is the battery? If you read up on this, you will see that they can fail in strange ways.
Battery is as old as the X5, so 5 years now...without a doubt it has to be changed, just wondering if that can cause the suspension issue ?
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Old 12-16-2013, 06:51 PM
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Repleace the battery and see if the suspension issue is addressed! Report back as that will be a useful tidbit.

FYI: See Link below for more info on the air system. Cannot say what might happen with the air solenoids if a module starts tweaking out due to low voltages...

http://www.bmwmotorsports.org/pdf/e7...%20Systems.pdf
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