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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 10-23-2016, 09:30 AM
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Location: Boston
Join Date: Mar 2009
Posts: 59
Mein Auto: 2002 530i Sport
Leaking Differential

Diff casing on my 2002 530i (automatic, 105K) has been damp since I got it two years ago. No noises or symptoms. Seems to be leaking from output shafts. Thinking I will change fluid and add stop leak/sealant (Lucas, AT 205, Blue Devil, etc...). Anyone used a sealant on an e39 diff?

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Old 10-23-2016, 09:39 AM
javarithms javarithms is offline
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Location: WA
Join Date: Oct 2015
Posts: 247
Mein Auto: '13 E92 M3, '03 530iA
Why not clean it first and determine where it's leaking from. Then fix the problem (gasket). Don't put snake oils in there that will do more harm than good.
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