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Lumbar Support Leaking...

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Old 05-20-2010, 03:14 PM
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My Ride: 2006 525i Titanium Silver, All Weather, XM (Aftermarket)
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Hi Fellow Bimmers,

My 2006 525 has 140,000 miles (virtually all highway), so I'm spending some time and cash to have some minor body nicks fixed and otherwise bring it up to like-new condition,,,which its pretty close.

The only thing that is a nagging issue for me is that the lumbar support will expand normally when the button is pressed, but after a few hours it will shrink down to its normal level. I suspect a tube leak or something. Is there a document/resource that I can refer to when trying to find/fix the issue in the lumbar "bladder"?

Thanks all!
Old 05-20-2010, 03:22 PM
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Originally Posted by mleuba
Hi Fellow Bimmers,

My 2006 525 has 140,000 miles (virtually all highway), so I'm spending some time and cash to have some minor body nicks fixed and otherwise bring it up to like-new condition,,,which its pretty close.

The only thing that is a nagging issue for me is that the lumbar support will expand normally when the button is pressed, but after a few hours it will shrink down to its normal level. I suspect a tube leak or something. Is there a document/resource that I can refer to when trying to find/fix the issue in the lumbar "bladder"?

Thanks all!
Check the valve unit which is #3 in the diagram, along with all associated hoses.
Attached Thumbnails Lumbar Support Leaking...-234.png  
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