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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Originally Posted by cyam
Yes - have a 2020 M340i about 20,000kms on it and I have noticed some drops of oil under the rear diff. I have it scheduled for dealer to inspect/fix next week.
I am unaware of any ECU flashes/upgrades, I had the car serviced last week and they said no software upgrades were needed. Mind you I have only had the car a couple of weeks. It was due a service which was of no charge to me. They should have noticed the diff leak IMO.
Will let you know what they say after I bring it in.
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