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On my 2001 expedition I have 2 of them. One just under the front bumper, near the middle, but closer to the passenger side, and one under the truck, directly below the driver side seat, against the frame. They are like a one way valve for the air, but are a sensor for air pressure as well. A check valve of sorts. When they malfunction, your air ride wont have the right amount of pressure. My front one started to leak air and thus my compressor was constantly coming on to adjust for lower pressure in the front air shocks. I thought that my new shocks had failed already, but further research showed that it might be that solenoid. I replaced it and problem solved.

Sometimes you see the rear end lower then the front and that may be caused by one of three things.

1 - rear bags may need to be replaced, leaking air

2 - leveling valve for rear bags is not working properly or at all, or needs to be adjusted.

3 - solenoid is malfunctioning. the one under the drivers seat, against the frame.

I also found out that the solenoid can only be purchased through your dealer. I was not able to find any after market places to buy one. The cost of mine was $101.93 from Ford in Canada.

I hope this helps

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15y ago

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