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  #1  
Old 11-09-2019, 11:05 PM
Stan Still Stan Still is offline
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Mein Auto: E53 X5 4.4i
2005 4.4i X5 nightmare.

Hi guys,

Two major issues.

1: Shudder when under load and/or accelerating. Checked everything..... eventually replaced the plastic gear in the transfer case actuator motor. This seemed to fix the problem for a few weeks, then it came back. Got sick of it so dropped driveshaft to front axles off. Fixed problem. Car is now rear wheel drive only for last 10,000 k's.

Is this bad ?

2: Rear suspension started sagging. Get in car in morning and rear suspension was right down both sides. Open driver door, pump comes on and pumps up rear suspension back to normal height. Today though the pump tries but there's a major hissing coming from up under the rear wheels (think drivers side) and rear suspension doesn't move/reinflate. "Self leveling susp inactive" comes up on dash now. I jacked up rear drivers side and removed wheel to have a look.....the pump wouldn't come on at all. Put wheel back on and lowered car on jacks and then the pump came on. I guess there's some sort of position sensor ?

Anyway, searching here finds lots of airbag issues. I would replace both sides on the rear, but why would the whole rear suspension go down if only one bag was faulty ?

Shouldn't it just sag on one corner ? What are the odds of both sides leaking at the exact same time ? or would both sides go down even of only one airbag was leaking ?

Just want to rule out something else before I buy two new rear airbag springs.

Any helps/thoughts would be appreciated !!!
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  #2  
Old 11-10-2019, 04:58 PM
Stan Still Stan Still is offline
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Anyone ?
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  #3  
Old 11-10-2019, 05:20 PM
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Zulu95 Zulu95 is offline
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Pump may be running but is it pumping?
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2001 X5 3.0L

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Old 11-10-2019, 07:00 PM
Stan Still Stan Still is offline
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Good point.

I think so as when the compressor sitches on there's a hissing sound coming out from under the car. I'm assuming the pump is pumping but the air is immediately leaking out.

Last edited by Stan Still; 11-10-2019 at 07:22 PM.
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Old 11-10-2019, 07:41 PM
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Zulu95 Zulu95 is offline
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And if you do not cure the leak then you'll burn out the pump and have to rebuild it.
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Old 11-12-2019, 03:02 AM
Stan Still Stan Still is offline
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I think I might throw some coil springs in the back and call it a day.
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Old 11-19-2019, 12:34 AM
Stan Still Stan Still is offline
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228 views and only one guy who's helpful.

Anyway, I bought new air springs and a compressor rebuild kit.

I'll put them in on the weekend.
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Old 11-19-2019, 06:41 AM
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Zulu95 Zulu95 is offline
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Having been reading about "Air Spring" problems for over 15 years both here and on other boards (Including Toyota) I have to say I would stay clear of them given the choice. I know some will sing their praises but they always get you in the end. Your plan sounds like a worker and hopefully get you back to enjoying the drive. GL!
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Old 11-20-2019, 01:04 AM
Stan Still Stan Still is offline
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I'll keep you updated on progress
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  #10  
Old 11-21-2019, 05:37 AM
Astrok Astrok is offline
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Mein Auto: 2005 X5 and X3
Years with air suspension

Having lived for 10 years with 2 air suspension cars( X5 and R500) the bags are the Maine falilure followed by pump distribution valve then height sensors
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Old 11-22-2019, 01:40 AM
Stan Still Stan Still is offline
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Thank you Astrok.

Very kind of you to offer your advice

I appreciate it.
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  #12  
Old 11-30-2019, 06:12 AM
Stan Still Stan Still is offline
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Replaced both bags today. Pretty easy job except getting them in/out was a pain as there's hardly any clearance.

I ended up stepping in the hub while helper jimmied the bags out, then new ones in.

Rear end pumped up fine and doesn't appear to be leaking.

Also did front pads, rotors and wear sensors and gave the old girl an oil change.

She's now running much better.
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