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E39 (1997 - 2003)
The BMW 5-Series (E39 chassis) was introduced in the United States as a 1997 model year car and lasted until the 2004 when the E60 chassis was released. The United States saw several variations including the 525i, 528i, 530i and 540i. -- View the E39 Wiki

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Old 11-04-2011, 10:50 PM
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Rami2001 Rami2001 is offline
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Mein Auto: 540i
01 540i tank venting valve, any DIY?

Is there any DIY for tank venting valve replacement for a 540i? I googled but only one found and it was for M5 so I was wondering if it works the same with mine. Any help will be appreciated.

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Old 11-05-2011, 07:45 AM
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bluebee bluebee is offline
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Mein Auto: 02 BMW 525i M54 auto 130K
Originally Posted by Rami2001 View Post
Is there any DIY for tank venting valve replacement for a 540i? I googled
Doing an E39-only title-only search for "tank vent valve" only found one hit:
- CEL, Code 98 Vent tank Valve

I also ran a search for "vent" in the bestlinks and only found the common CCV problems (which I don't think you're referring to).

I'm not sure 'what' it is but it's likely associated with the vacuum hoses so it will be especially important to the rest of us if you snap pictures when you do perform your DIY.

Here is a reference to for my 525i vent valve from this recent vacuum line thread:
- Might we be able to list, with pics (realoem diagrams ok) of ALL E39 vacuum lines?

Is that the valve you're talking about?

Fuel Preparation System => Fuel injection system => FUEL TANK BREATHER VALVE

Originally Posted by bluebee View Post
Based on charcoal canister information in this thread today, I've updated the realoem diagram below to be more clear as to the end points of the hoses:
- E39 (1997 - 2003) > fuel tank breather valve 2001 525

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