05-17-2022, 12:57 AM | #45 | |
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I have been told by dealership its a leaking gasket and they are ordering parts to fix it under warranty. That's certainly different to the solutions mentioned here, but we'll see what they discover and do when they actually go to "fix" it.
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07-29-2022, 04:56 PM | #46 |
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Going back to the dealer next week for this issue. My diff is starting to make noise now under load. Probably because it's low on fluid and they won't replace it. I will update what the outcome is. This is visit #4 for the same diff leak issue.
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08-04-2022, 10:22 AM | #47 |
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Update: BMW is FINALLY doing something. They ordered a new diff cover to see if it will resolve the leak as it's coming from the breather ports and the drain/fill plugs are dry. No dealer in the US had one in stock is what they said so they ordered it straight from Germany. They said to bring the car back in 3 weeks when they get the part in stock. But in the meantime, they topped off the diff fluid.
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10-19-2022, 04:09 PM | #48 | |
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11-02-2022, 06:58 AM | #50 |
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11-17-2022, 10:14 PM | #51 |
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any update to this thread? My diff is leaking. same issue as everyone else. is there a TSB?
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11-22-2022, 07:03 PM | #53 |
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This is everything from the work order
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11-22-2022, 07:05 PM | #54 |
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Go to the dealer and show them. There is no TSB as far as I can see but it's blowing oil out of the top breather holes on the diff cover. Replacing it with the newer super-seeded diff cover is definitely the fix. I have had zero leaks after it was replaced.
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11-22-2022, 07:06 PM | #55 |
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You can change the fluid. The leak is not from the drain/fill plug.
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11-22-2022, 08:05 PM | #56 |
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did they replace just the cover or the vent assembly as well? and drain plug?
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11-22-2022, 08:09 PM | #57 |
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I am pretty sure the vent assembly is on the diff cover, it goes along the top. They originally replaced only my drain plug and it was still leaking. They replaced it again I believe when they changed the diff cover.
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11-30-2022, 12:00 AM | #58 |
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I provided the solve and workup. My car was the test mule and it is still operating correctly.
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11-30-2022, 08:38 PM | #60 |
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please provide details. doc number, pic of doc etc.
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12-01-2022, 08:55 PM | #61 | |
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Same, I went for an inslection service this morning and asked them to look at the diff. Confirmed breather issue and is booked for two weeks time to replace rear diff cover. Also got flagged for tuned DME but they were cool as about it and asked what I was planning on doing mods wise. |
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12-02-2022, 12:52 AM | #62 |
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12-02-2022, 09:24 AM | #63 | |
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thanks.
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12-12-2022, 04:05 AM | #64 |
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12-21-2022, 02:57 AM | #65 |
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Is everyone who is facing this issue Xdrive? RWD here and noticed my diff cover oily/grimy and possibly a drop or two on the ground. Right at about 40K miles. Wonder if there is a TSB for RWD models.
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12-21-2022, 02:33 PM | #66 |
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There is no TSB. It's an issue on M340i's and Supra's. It's due to the design of the breather holes on the top of the diff. I have a RWD M340i and BMW replaced my diff cover under warranty and it does not leak anymore.
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