Question about BMW 528

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BMW 528i s reg rear suspension

Looking for any possible faults due to sudden loss of air in rear suspension?

Pump is working so electrically sound and i think it maybe the air cylinder at the suspension end.


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  • Anonymous Jul 27, 2008

    Although my car is the E39 [525] touring, I have the identical problem - the rear suspension suddenly failed. The pump runs, the fuses are sound. The near side failed first. I live in Miltopn Keynes, UK. Any advice out there to guide my next move or identify the failure - thanks. 




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Check for pressure out of the air pump. If there, then the problem is a blown seal in the shock.

Posted on Jul 02, 2008


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Air suspension question is for a BMW e39 528i touring 1998

didn't know there was air suspension on an e39

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I replaced my head gasket on my 2000 528i BMW. Now that I am finished the car runs great. I didn't have any codes when I started the job but now I have P0412 code and a CEL. Secondary air valve...

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Congrats on replacing the head gasket successfully! In regards to your secondary air system. I would first start with the electrical air pump supply located on the passengers side of the engine compartment. You can locate the supply hose (about 1 1/2 inch diameter) at the front of the exhaust manifold. The hose connects to the secondary air valve. Make sure the hose is connected. Also make sure if there is a vacuum supply line to the secondary air valve, that it is not broken/or disconnected. If the hoses are ok and secure, then remove the larger supply hose from the valve when the engine has not been started for 4-5 hrs and make sure you have air flow from the air pump. The pump should be audible and operate for approximately 30seconds to a minute. If you are still having issues after these checks, I can list other possible causes.

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Repair to my car


Your concern is your BMW displays the message "SELFLEVEL SUSP. INACT" which indicates that the car's computer detects a problem with your active suspension system. Self-leveling is standard to most late model BMWs. It works on a pump, an air system and a computer that tells which suspension gets how much height, ride stiffness and other suspension settings.

Your concern is a known issue though not that fairly common. Technically, the best would be to contact your dealer or if in The USA, BMW of North America, LLC. call (800) 831-1117 or email

You may want to mention a possible problem with the firmware/software of the EHC (Electronic Height Control) Control Module. They may want to recode (flash). It is also possible to have air leaks in the system specially on the suspension bladder.

Other things you can check are tire pressure (30PSI), see if your ride is a bit stiff/hard now compared to before the earning displayed showed up, handling difficulty, loopsided/tilted level among others.

Incidentally, if there is nothing out of the ordinary in how the car ride, handle or drive, it may just be a systems glitch. Try jockeying the key to ON/OFF a couple of times.

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards.

Thank you for using FixYa.

Jun 27, 2008 | 2003 BMW 5 Series

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