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Dreaded self-levelling(self-destructing) suspension issues........help!

Discuss the problems with your X5 (E53).
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Dek
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Dreaded self-levelling(self-destructing) suspension issues........help!

Post by Dek » Thu Jun 25, 2015 4:52 pm

Hello all,
Here is a picture of my 4.8is
Image

She's bog standard but i like her like that.

Sadly, this picture was taken back in the glory days, before a thing called self-levelling suspension ruined my life.
It all started with the off-side front, getting up in the morning to find her lurched over to a degree that would embarrass the local drunk. After starting her up she would return to normal height, which was fine, but i knew this was not normal operation and knowing nothing about self-levelling suspension i took her off to my local independent specialist.

So, straight off the bat, my indy said it would be the pump. Coming in at over £500(non-OEM) it was a lot of money but their confidence was reassuring so i went for it, turns out that didn't work, so i left it with them. A week later I pop in to see how they are getting on. They told me they've checked all the bags thoroughly and they are fine, so unfortunately, it's looking like it's the ECU. Can't remember the price they quoted but it's probably because my brain has refused to acknowledge the event ever happened. Then, my only bit of luck in this sorry affair came in to play. As he had the autologic gizmo plugged in to the car and he was lifting the car up and down to show it wasn't the bag, there was an almighty rush of air as the bag finally gave out, hurrah, it wasn't the ECU and the bag gave out just before i paid for one........thank god!!

So i ordered a new bag (£200 arnott i think), got it fitted, self-levellling warning cleared, job done. That lasted about 2 weeks then the near-side front bag went which i wasn't too concerned about as it was a straight blow out and super-easy to diagnose. Ordered a new bag, got it fitted, self-levellling warning cleared, job done.

I then went on to have 9 months of perfectly level trouble free motoring until, yet again, the self-levelling suspension warning came on. Back to the indy, who found a rear sensor to be at fault. Ordered a new sensor (a reasonable £70), got it fitted, self-levelling warning cleared, job done. Only a month or so later the self-destructing warning light came back on, so, back to the indy, who is saying that i am now needing another height sensor and a new EHC2 module coming in at around £1200 including fitting and calibration.

I have tried to keep the car standard as possible which i why i have hung in with the air suspension but i cant afford to keep throwing money at it, especially as my indy says that it was the sensor that wrecked the module, so really, i could shell out the £1200, replace the sensor and module only for another sensor to blow the module again next month :evilmad:.

I am now resigned to the fact that as i don't earn 150k+ a year i don't have the funds to be able to keep air suspension in my life, so i'm ripping it out, but i am having trouble finding out just whats involved in it. Most of the posts i read are concerning rear air suspension only, as are the conversion kits i find online. The rear looks easy enough to do so i am going to have a crack at this myself but can anyone please tell me where i can find information on the removal of 4 corner air suspension and also where i can find the replacement parts i require?
As i said earlier i like the standard look so do not want springs that drop her to the floor, truth be told, i actually preferred her during her crazy period when she had jacked herself up even higher but although she looked mean as s**t the ride was also s**t, so i will settle for standard height.

Thanks for reading my post, any information on the above will be most welcome.

Mpower
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Re: Dreaded self-levelling(self-destructing) suspension issues........help!

Post by Mpower » Fri Jun 26, 2015 11:29 am

I had a matewho had also an 4.8 with all air and they had asked me take a look at it for them as they've been quoted mega £'s to fix it.
I advised them to convert to springs all round sourcing parts from ebay,rears were brand new springs replacing airbags and secondhand front shocks/springs  for thefront axle.
Parts wise it totalled £200 for rears and £70 for fronts,fitted it no problem and coded out the air suspension from VO and deleted air susp inactive from cluster,also a full 4 wheel alignment done.
That was a good 8 months ago and havent heard anything wrong since,cheap fix with no more problems for small outlay!

Dek
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Re: Dreaded self-levelling(self-destructing) suspension issues........help!

Post by Dek » Fri Jun 26, 2015 7:28 pm

That sounds spot on. Can you remember what front strut/springs you bought? I guess it would be the 4.6is ones.

Mpower
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Re: Dreaded self-levelling(self-destructing) suspension issues........help!

Post by Mpower » Fri Jun 26, 2015 10:41 pm

Yes mate they were from the 4.6 cheap from fleabay.

Dek
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Re: Dreaded self-levelling(self-destructing) suspension issues........help!

Post by Dek » Sat Jun 27, 2015 12:44 am

Magic, thanks for your help.

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Re: Dreaded self-levelling(self-destructing) suspension issues........help!

Post by X5-D-Sport » Sun Jun 28, 2015 4:15 pm

just or my 3 penneth worth,

I bought a used pump, valve module & electronic control unit + 2 levelling sensors for £245 the lot on e-bay...

While they were waiting to arrive, I got some specialised O-Ring silicone liquid & injected some into the air input points of the air valve control block - at the pump, and this stopped the sagging instantly...

Turns out that the valve block likes to be wet...(any old lubricant will destroy it), has to be the specialised Silicone o-ring lubricant.
I squirted just a single squirt of 1cc into the valve block air input & another 1cc into the output point of the pump - never sagged since in 6 months.... where as it would sag every couple of weeks before.....

A reason some of these modules fail in the tyre well, is because the battery vent may drop off the battery & the pump then simply gulps up all the acidic gasses from the battery & airborne dirt particilates as soon as you start every day...

and the same sulphuric gasses are pretty efficient at chewing the circuit boards to bits of the dozens of control modules in the boot space... so ensure you fit the battery vent tube if you notice it is missing..
It vents to atmosphere thru the bottom of the battery bay.
Last edited by X5-D-Sport on Thu Jul 02, 2015 12:12 am, edited 1 time in total.

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Re: Dreaded self-levelling(self-destructing) suspension issues........help!

Post by X5Sport » Sun Jun 28, 2015 7:11 pm

Which is why we remind everyone to get your battery vented!!  If the pipe is missing, get a replacement and connect it up.

Nothing like a bit of acidic emission to corrode your delicate bits......and the other gas produced is mainly hydrogen which though in very low quantities does rather like to warm the party up if the mix is right.
:ant: Never anthropomorphise computers. They hate that.

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