Testing BMW X5 air suspension

Sadel Owner/Technician Ohio Posted   Latest  
Demonstration
Chassis
2007 BMW X5 3.0si 3.0L (N52B30A) 6-spd (GA6HP19Z)
Rear Suspension Down

Here is one that is very common , its a faulty air suspension compressor. And I wanted to share just to show some ways of getting visual data and being able to say why the compressor is the problem. Especially good to share because I've had many times been encountered with these issues where I'm told the compressor is "good" because it turns on and the can "hear" it, but even at that point it still wont raise the vehicle. So I started to do this just to be able to show the customer. And it works across many makes, not just on BMW's. Hope it gives some tips and thanks again.

youtube​.​com/watch?v=inVodq…

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Hamid Mechanic
California
Hamid
 

Keep that compressor, and disassemble the head of the compressor. You should either see the piston is pulverized, or the cylinder is so scored that all air just escapes past the walls. It's a good example to show to customers, the compressor still turns on, it still moves the piston, but the damages to the piston or the head or the bore makes it non functional.

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Sadel Owner/Technician
Ohio
Sadel
 

Hey Hamid, that job was actually like 2 years ago and the customer opted for coil spring conversion actually, but yes I did get curious and tore it apart and found the damage like you said inside of it, was cool to see

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Bill Owner/Technician
Michigan
Bill
 

Sadel nice demonstration of the system function. One could also use a fuel pressure gauge to measure output pressure as well. Just another way to do it if you don't have a pressure transducer.

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Sadel Owner/Technician
Ohio
Sadel
 

Yes Bill, definitely didn't think about that, only thing would be that if the pump were to be good and making good pressure , hopefully the gauge would be scaled high enough for it, but if it were making low psi then you would for sure get a good reading

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Agree