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#11
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Have you checked the proportioning valve and lines at the big air tank under the truck for leaks? There is front/rear distribution on that solenoid and a gasket material between. This tank and the solenoid (I have 2 because I was chasing my issue ):
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2005 X5 4.4i Build 04/05 Maintenance/Build Log Nav, Pano, Sport (Purchased 06/14 w/ 109,000 miles) (Sold 8/15 w/121,000 miles) 2006 X5 4.8is Build 11/05 Maintenance/Build Log Nav, DSP, Pano, Running Boards, OEM Tow Hitch, Cold Weather Pckg (Purchased 08/15 w/ 90,500 miles) 2010 X5 35d Build 02/10 Nav, HiFi, 6 DVD, Sports Pckg, Cold Weather Pckg, HUD, CAS, Running Boards, Leather Dash, PDC, Pano (Purchased 03/17 w/ 136,120 miles) |
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#12
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I did take the bottom panel off and soaped all fittings on the tank and proportioning valve no leaks. When i did the ista test it checked all functions of the valve, tank, compressor, sensors etc. They where working.
I am not sure if there is an exhaust valve on the pump itself. my next step is to get at the pump and verify that nothing is leaking in there. pump does get up to 15.5 bar so it is working properly. No water leaks in spare tire compartment. It is so intermittent that is is hard to locate the problem. Maybe a sticking solenoid. This is why i am wondering if the proportioning valve is serviceable.
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2006 e53 4.4i |
#13
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I disassembled one of mine. It is "serviceable." I don't your find individualparts (I couldn't when I tried), but it was easy enough to take apart and reassemble so a fix could probably be improvised.
I went through this same song and dance for a month or so.
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2005 X5 4.4i Build 04/05 Maintenance/Build Log Nav, Pano, Sport (Purchased 06/14 w/ 109,000 miles) (Sold 8/15 w/121,000 miles) 2006 X5 4.8is Build 11/05 Maintenance/Build Log Nav, DSP, Pano, Running Boards, OEM Tow Hitch, Cold Weather Pckg (Purchased 08/15 w/ 90,500 miles) 2010 X5 35d Build 02/10 Nav, HiFi, 6 DVD, Sports Pckg, Cold Weather Pckg, HUD, CAS, Running Boards, Leather Dash, PDC, Pano (Purchased 03/17 w/ 136,120 miles) |
#14
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When you took you valve apart could you see any evidence of sticking or leaks?
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2006 e53 4.4i |
#15
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I did not. And since I had the same results with both valves and tanks I moved on in my diagnosis and ruled out those components as the problem.
I do miss my air suspension's functionality, but I do not miss the headaches. At all.
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2005 X5 4.4i Build 04/05 Maintenance/Build Log Nav, Pano, Sport (Purchased 06/14 w/ 109,000 miles) (Sold 8/15 w/121,000 miles) 2006 X5 4.8is Build 11/05 Maintenance/Build Log Nav, DSP, Pano, Running Boards, OEM Tow Hitch, Cold Weather Pckg (Purchased 08/15 w/ 90,500 miles) 2010 X5 35d Build 02/10 Nav, HiFi, 6 DVD, Sports Pckg, Cold Weather Pckg, HUD, CAS, Running Boards, Leather Dash, PDC, Pano (Purchased 03/17 w/ 136,120 miles) |
#16
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There are many other things to worry about on this car. I would like to drop the air suspension off my list.
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2006 e53 4.4i Last edited by roadriderg; 12-09-2020 at 02:08 PM. |
#17
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Suspension is fixed!! Seems that it was a leaking airbag after all. The reason it was intermittent was the height of the car would put the airbag roll in a position that it would leak. Slow leak just at the fold. When not in position it would hold air.
It was being particularly bad one day so I rechecked the bag with soap and water and found it. I replaced both air struts and now the car is good. Odd thing is this is the second time the bags had been replaced . Once under warranty at 52000 miles and now at 82000 miles. I am just ecstatic that it is fixed !
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2006 e53 4.4i |
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