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      11-21-2020, 03:57 PM   #1
Thewolfbmw
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M50i - Not a good sign

Looking to clean out the garage before winter is in full swing and then I see a odd pool of fluid on the garage floor.

The leak is coming from the rear. I can't tell if it is an axel seal, pinion seal or something else.

What is everyone's thoughts. 2600 miles on the clock.

[IMG]undefined[/IMG]
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      11-21-2020, 04:00 PM   #2
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No idea for sure, but thank goodness you are still under warranty. At least you can sleep good tonight.
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      11-21-2020, 04:03 PM   #3
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^ Exactly. Let the dealer take care of it and likely there will be no long term damage since you seem to have caught it early before hearing/feeling anything wrong. Keep us updated on what problem/fix was.
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      11-21-2020, 04:06 PM   #4
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Yup get in to the dealer and get it fixed mate.
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      11-21-2020, 04:17 PM   #5
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Quote:
Originally Posted by Mighty Mouse View Post
No idea for sure, but thank goodness you are still under warranty. At least you can sleep good tonight.
I had the rear air suspensions go out on me a week after the warranty had ended on the previous F15. Trust me. I did not sleep well that night. However, BMW Canada covered it under warranty because they had opted to extend my warranty for an extra month due to Covid-19. I was really really lucky.
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      11-21-2020, 04:25 PM   #6
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Looks like M Sport rear-axle differential, output shafts. The silver finned portion is the rear cover and the tubing in the last photo is the vent pipe.

Looks like a slow leak, but I'd limit high speed driving and definitely take it to the dealer to confirm.
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      11-21-2020, 05:12 PM   #7
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Another bmw diff leaking out of the factory🤔
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      11-21-2020, 05:59 PM   #8
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Sorry about the poor photo orientation. I will follow up next week. Hoping its just something that came loose. I doubt it a coincidence this happened a couple days after I final decided to push it hard and get some 40 - 100 and 60 - 130 times.

I sent my SA the photos this afternoon and said they would have a car ready for me when I can get it in next week.

My SA is truly one of a kind and the only reason I keep buy BMW's.
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      11-21-2020, 06:00 PM   #9
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Quote:
Originally Posted by Auricom View Post
Looks like M Sport rear-axle differential, output shafts. The silver finned portion is the rear cover and the tubing in the last photo is the vent pipe.

Looks like a slow leak, but I'd limit high speed driving and definitely take it to the dealer to confirm.
Definitely is a M Sport Diff.

Thank you for diagrams..
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      11-21-2020, 06:05 PM   #10
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Quote:
Originally Posted by wifesbimmer View Post
Quote:
Originally Posted by Mighty Mouse View Post
No idea for sure, but thank goodness you are still under warranty. At least you can sleep good tonight.
I had the rear air suspensions go out on me a week after the warranty had ended on the previous F15. Trust me. I did not sleep well that night. However, BMW Canada covered it under warranty because they had opted to extend my warranty for an extra month due to Covid-19. I was really really lucky.
Very lucky. My '16 F15 50i had air suspension. SA told me it was 2k minimum to fix.

Ran it hard for 77k wonderful and worry free miles....then it was time to trade it in.

Wish I could put the G05 interior in the F15 body. Oh, and the M50 motor too.
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      11-21-2020, 06:17 PM   #11
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Quote:
Originally Posted by Thewolfbmw View Post
Quote:
Originally Posted by Auricom View Post
Looks like M Sport rear-axle differential, output shafts. The silver finned portion is the rear cover and the tubing in the last photo is the vent pipe.

Looks like a slow leak, but I'd limit high speed driving and definitely take it to the dealer to confirm.
Definitely is a M Sport Diff.

Thank you for diagrams..
Quote:
Originally Posted by Thewolfbmw View Post
Sorry about the poor photo orientation. I will follow up next week. Hoping its just something that came loose. I doubt it a coincidence this happened a couple days after I final decided to push it hard and get some 40 - 100 and 60 - 130 times.

I sent my SA the photos this afternoon and said they would have a car ready for me when I can get it in next week.

My SA is truly one of a kind and the only reason I keep buy BMW's.
Not an uncommon issue with M Differentials, but disheartening on a new and low mileage M50i though good that the issue surfaced early. Hopefully it's just the seals and not gasket (requiring a rebuild or rep).

Keep us posted.
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      11-23-2020, 05:04 AM   #12
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Parts list

Quote:
Originally Posted by Auricom View Post
Looks like M Sport rear-axle differential, output shafts. The silver finned portion is the rear cover and the tubing in the last photo is the vent pipe.

Looks like a slow leak, but I'd limit high speed driving and definitely take it to the dealer to confirm.
Dear Auricom,

can you tell me which app or website are you using, to get those drawings with parts lists? I am having a bit of a struggle with my dealer, with only 2000 miles in my m50i. This would be a big help to understand my problem as well, and put more pressure on my dealer. Sorry for the off-topic comment guys...
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      11-23-2020, 05:40 AM   #13
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What is your dealer giving you a hard time about?
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      11-23-2020, 08:17 AM   #14
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Quote:
Originally Posted by Victor1984 View Post
Quote:
Originally Posted by Auricom View Post
Looks like M Sport rear-axle differential, output shafts. The silver finned portion is the rear cover and the tubing in the last photo is the vent pipe.

Looks like a slow leak, but I'd limit high speed driving and definitely take it to the dealer to confirm.
Dear Auricom,

can you tell me which app or website are you using, to get those drawings with parts lists? I am having a bit of a struggle with my dealer, with only 2000 miles in my m50i. This would be a big help to understand my problem as well, and put more pressure on my dealer. Sorry for the off-topic comment guys...
https://bimmercat.com
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      11-24-2020, 01:58 AM   #15
Victor1984
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Humming noise

Quote:
Originally Posted by TomCat6065 View Post
What is your dealer giving you a hard time about?
Dear TomCat,

i am having a constand vibration/ humming noise at certain speeds, especially at 60MPH and 90 MPH. I have attached a video about the issue. Dealer says it is normal LOL...

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      11-24-2020, 07:07 AM   #16
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Quote:
Originally Posted by Victor1984 View Post
Quote:
Originally Posted by TomCat6065 View Post
What is your dealer giving you a hard time about?
Dear TomCat,

i am having a constand vibration/ humming noise at certain speeds, especially at 60MPH and 90 MPH. I have attached a video about the issue. Dealer says it is normal LOL...

I recommended starting a new thread for your vehicle issue as to not hijack the OP's thread.
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      11-24-2020, 02:50 PM   #17
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Update.....

Dropped X5 off this morning. SA messaged me that it was a bad axel seal. Ordered new ones for both sides.

Replace seals and top off the fluid.

He said; never seen them go bad at such low mileage.

Any thoughts or concerns I should address?
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      11-24-2020, 03:18 PM   #18
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Quote:
Originally Posted by Thewolfbmw View Post
Update.....

Dropped X5 off this morning. SA messaged me that it was a bad axel seal. Ordered new ones for both sides.

Replace seals and top off the fluid.

He said; never seen them go bad at such low mileage.

Any thoughts or concerns I should address?
It's good that it failed early! Things break that is what things do, glad to see it happen early on and not just after warranty... lol
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      11-24-2020, 05:01 PM   #19
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Just chalk it up to another quality control problem in my opinion. Seal failures under those conditions (i.e., very new) are usually attributed to improper installation. Your flogging just exposed that flaw early.
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      11-24-2020, 10:40 PM   #20
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Quote:
Originally Posted by Victor1984 View Post
Quote:
Originally Posted by TomCat6065 View Post
What is your dealer giving you a hard time about?
Dear TomCat,

i am having a constand vibration/ humming noise at certain speeds, especially at 60MPH and 90 MPH. I have attached a video about the issue. Dealer says it is normal LOL...

Sorry you are having issues. But that definitely is not normal.

I can't tell if it is an exhaust drone or not.

When you are at speed and put the car in Neutral, is the noise still consistent?
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      11-25-2020, 03:35 AM   #21
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Humming noise

Quote:
Originally Posted by Thewolfbmw View Post
Sorry you are having issues. But that definitely is not normal.

I can't tell if it is an exhaust drone or not.

When you are at speed and put the car in Neutral, is the noise still consistent?
Thewolfbmw,

yes in neutral the sound doesn't change at all it is the same. I dont want to hijack OP's thread, if anybody can help me with suggestions please post to this thread:

https://g05.bimmerpost.com/forums/sh....php?t=1773050

Thank You
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      11-25-2020, 07:41 AM   #22
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There are warranty repairs done on many new cars, no big deal. Late model vehicles are incredibly complex compared to a couple decades ago. Take it to the dealer and get it right.
Anyone who has been around BMW, Porsche, MB, knows that you really don't want to own these cars without a decent warranty.
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