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Discussion Starter #1
Hello all,

I have a friend who has a 2008 E92 320i. He has a leak on his rear diff and we’re trying to diagnose the problem.

He’s had the rear diff changed to solve the issue but there’s still oil leaking from there.

any ideas would be great, cheers.
 

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It'll most likely be one of three things:

1. Drain/fill plug (very unlikely)
2. End plate gasket (unlikely)
3. Drive shaft inner seals (most likely).
 

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I'd agree with Phil325i but also add to that the prop input seal to the diff.

I run Landrovers, they all drip oil from diffs eventually and it's always the seals/bearings that go.
 
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