I just discovered the first mechanical problem with our new '99.5 A4. The passenger side rear differential axle seal appears to have failed and is causing a drip on the garage floor. Looks like about one drip per day, but I don't know how long it's been leaking.
The past receipts show the same seal was replaced under warranty 2 years ago for the previous owner, so I'm wondering if something else is causing the seal to fail. Any ideas? Bad bearing maybe? How much would that cost to fix?
Thanks.
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