2011 M3 coupe diff leak

AbhiM3 · 05-19-2023, 03:21 PM

Hey guys I think I have a diff leak, car is parked in the garage and there’s a few drops that accumulate every other day after it’s driven and parked could this be from a seal? Would the diff need to come out for the repair? Btw car has 57k miles so was a little worried why it would happen at low miles maybe it’s cause of the age. Thanks for the input in advance.

NiBe · 05-19-2023, 03:28 PM

Hi, my tip is shaft seal. Number 7 here:
https://www.realoem.com/bmw/enUS/sho...diagId=33_1418

I had a leak there too. 50K miles.

You don't need to remove diff to change this seal. You need to remove just drive shaft.

fs34 · 05-19-2023, 04:19 PM

I’m guessing rod bearings

AbhiM3 · 05-19-2023, 08:18 PM

Appreciate the help I’ll look into it!

Redd · 05-20-2023, 01:26 AM

Various places on the diff it could leak from. Guessing is useless. Just get under the car and take some pics.

Scharbag · 05-20-2023, 06:39 PM

It is also a super simple diff to pull.

If it is the input shaft seal, only let qualified people work on it (or do it yourself and follow the TIS directions).

Cheers,

RocketyMan · 05-21-2023, 02:23 PM

Quote:

Originally Posted by AbhiM3

Appreciate the help I’ll look into it!

I bet it's the diff pinion seal--but can also be the CV axle inputs. At any rate, I would get the FCP engineered seal.

Gareth does a real great DIY of this seal as seen here:

Can buy it here:
https://www.fcpeuro.com/products/bmw...49#description

BP709 · 05-21-2023, 04:38 PM

As others already said it’s likely the pinion/input shaft seal. Did mine earlier this year.

05-19-2023, 03:21 PM	#1
AbhiM3 New Member 118 Rep 22 Posts Drives: BMW E92 M3 Join Date: Nov 2019 Location: Corona, California iTrader: (0) Garage List 2011 BMW M3 Coupe [9.83]	2011 M3 coupe diff leak Hey guys I think I have a diff leak, car is parked in the garage and there’s a few drops that accumulate every other day after it’s driven and parked could this be from a seal? Would the diff need to come out for the repair? Btw car has 57k miles so was a little worried why it would happen at low miles maybe it’s cause of the age. Thanks for the input in advance.
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05-19-2023, 03:28 PM	#2
NiBe First Lieutenant 453 Rep 365 Posts Drives: BMW E91 & E92 Join Date: Nov 2021 Location: Europe iTrader: (0)	Hi, my tip is shaft seal. Number 7 here: https://www.realoem.com/bmw/enUS/sho...diagId=33_1418 I had a leak there too. 50K miles. You don't need to remove diff to change this seal. You need to remove just drive shaft. Attached Images
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05-19-2023, 04:19 PM	#3
fs34 Lieutenant 395 Rep 416 Posts Drives: E46 M3 Join Date: May 2019 Location: Huntsville, AL iTrader: (1)	I’m guessing rod bearings
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05-19-2023, 08:18 PM	#4
AbhiM3 New Member 118 Rep 22 Posts Drives: BMW E92 M3 Join Date: Nov 2019 Location: Corona, California iTrader: (0) Garage List 2011 BMW M3 Coupe [9.83]	Appreciate the help I’ll look into it!
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05-20-2023, 01:26 AM	#5
Redd Brigadier General 3894 Rep 4,157 Posts Drives: 2010 BMW E92 M3 Dakar Edition Join Date: Jul 2015 Location: Malaysia iTrader: (0)	Various places on the diff it could leak from. Guessing is useless. Just get under the car and take some pics.
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05-20-2023, 06:39 PM	#6
Scharbag Colonel 2619 Rep 2,138 Posts Drives: 2011 E92 M3 Join Date: Oct 2017 Location: Victoria iTrader: (0) Garage List 2011 BMW E92 M3 [0.00]	It is also a super simple diff to pull. If it is the input shaft seal, only let qualified people work on it (or do it yourself and follow the TIS directions). Cheers, __________________ 2011 E92 M3 - 6MT, ZCP, ZF LSD, ESS G1, Some other goodies...
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05-21-2023, 04:38 PM	#8
BP709 Private First Class 229 Rep 191 Posts Drives: BMW F97 X3m, Harrop E90 M3 Join Date: Jun 2019 Location: Houston iTrader: (0)	As others already said it’s likely the pinion/input shaft seal. Did mine earlier this year. Attached Images
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