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#1
01-21-2014, 11:29 PM
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Replacement of Air Supply Device (air pump)
Hi all! Recently my car received 'Selflevl Susp. Inact' error message once. I tried to press the up and down button of air suspension and the light just flashed 3 times without action. I used DIS to check the fault code, it says something like 'accumulator ... remains constant...', actually I don't remember the exact words. I cleared the fault code and the car comes back to normal without the fault code. After having cleared the fault code, I also tested the up and down botton and it works normal. Just wonder does this mean my air pump is about to fail or just some kind of computer error (nothing needs to be done on this)?
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--2004 E53 X5 4.8is - ECE version; right hand drive; Located in Hong Kong; ext. black sapphire metallic; int. leather black; adaptive dynamic bi-xenon headlights; 16:9 onboard monitor w/o navigation; 20" genuine BMW Y-spoke 214 wheels with Bridgestone Dueler H/P Sport tires; Int. rear view mirror w/ compass. 
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#2
01-22-2014, 10:18 AM
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The accumulator filling pressure remains constant error is related to your compressor. Over time the seal on the piston gets worn out.
Search eBay for "wabco rebuild kit" on eBay its a 50 dollar preventative fix.
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2018 Ram 2500 6.7L Cummins 68RFE 19k miles -Bright White/Black - Big Horn Sport - Crew Cab Short Bed 2013 X5 35D (CEO's) - Born on 5/17/2013 - 82k miles - Alpine White/Cinnamon Brown/Premium Pkg, Sport Activity/Premium Pkg and Sound/20" Style 214/Running Boards
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#3
01-22-2014, 10:33 AM
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Here is a how to:
Bagpipingandy-how to fit Range Rover, BMW, Wabco air suspension compressor repair kit - YouTube
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BMWCCA # 480346 '72 e6Tii rip '90 e30iC sold
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#4
01-22-2014, 10:00 PM
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thanks for reply!
The pump now works normal after I cleared the fault code. I will keep my eyes on it and replace it when it stop working.
__________________
--2004 E53 X5 4.8is - ECE version; right hand drive; Located in Hong Kong; ext. black sapphire metallic; int. leather black; adaptive dynamic bi-xenon headlights; 16:9 onboard monitor w/o navigation; 20" genuine BMW Y-spoke 214 wheels with Bridgestone Dueler H/P Sport tires; Int. rear view mirror w/ compass.
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#5
01-22-2014, 11:45 PM
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Quote:
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2005 4.8is. Blue ext, white int.
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#6
12-14-2016, 05:01 AM
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Hi all! Just an update on my SLSI problem. Recently the error pops up periodically, like every 2 weeks something. Each time it pops up the error, I use DIS to run the diagnosis, it shows 'accumulator filling pressure remains constant', then I run the test to see what the problem is, the test completes without problem and the system comes back to normal and works ok. However, the error pops up after around 1-2 weeks and I run the test again, then everything gets back to normal. This has been happening for more than 3 times and I believe it will come back again in 1 or 2 weeks. Does this mean my air supply device (air compressor, usually called) already went bad and it needs to be repaired or replaced? Thanks for help!
__________________
--2004 E53 X5 4.8is - ECE version; right hand drive; Located in Hong Kong; ext. black sapphire metallic; int. leather black; adaptive dynamic bi-xenon headlights; 16:9 onboard monitor w/o navigation; 20" genuine BMW Y-spoke 214 wheels with Bridgestone Dueler H/P Sport tires; Int. rear view mirror w/ compass.
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