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      11-08-2017, 03:15 PM   #67
Kessler35is
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The 2011 35is I owned for 3 years didn't have this issue. Now I hope the 2016 I got last month doesn't develop the leak.
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      11-08-2017, 05:21 PM   #68
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Quote:
Originally Posted by Philly_sweden View Post
I just bought a 35is and now I want to look for this as well.
How is it visible? Where do I look?
Do I look for stains on the floor of the garage?

Thanks!
I bought a 2010 35i with @79K miles on it about a month ago. The first thing I did was take it to the BMW dealer for an oil change and to get it on a lift and give it a look.

There were two seperate transmission leaks, one on the side of the DCT, apparently a known issue and another on the transmission oil pan. I was told both were commonplace and they actually just replace the pan as they warp and/or crack causing them to leak.

Final bill was about $1300 in labor and $700 in parts and materials.

I had the car a week and did not note any drips on my garage floor before this however I did see the leaks when it was on the lift. I was told that the leak or seepage will normally occur for a long time before it is ever noted on the floor.
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      11-08-2017, 05:24 PM   #69
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Quote:
Originally Posted by 2Intense View Post
Quote:
Originally Posted by Philly_sweden View Post
I just bought a 35is and now I want to look for this as well.
How is it visible? Where do I look?
Do I look for stains on the floor of the garage?

Thanks!
I bought a 2010 35i with @79K miles on it about a month ago. The first thing I did was take it to the BMW dealer for an oil change and to get it on a lift and give it a look.

There were two seperate transmission leaks, one on the side of the DCT, apparently a known issue and another on the transmission oil pan. I was told both were commonplace and they actually just replace the pan as they warp and/or crack causing them to leak.

Final bill was about $1300 in labor and $700 in parts and materials.

I had the car a week and did not note any drips on my garage floor before this however I did see the leaks when it was on the lift. I was told that the leak or seepage will normally occur for a long time before it is ever noted on the floor.
Thanks!
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      11-08-2017, 06:21 PM   #70
Kessler35is
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Quote:
Originally Posted by 2Intense View Post
I bought a 2010 35i with @79K miles on it about a month ago. The first thing I did was take it to the BMW dealer for an oil change and to get it on a lift and give it a look.

There were two seperate transmission leaks, one on the side of the DCT, apparently a known issue and another on the transmission oil pan. I was told both were commonplace and they actually just replace the pan as they warp and/or crack causing them to leak.

Final bill was about $1300 in labor and $700 in parts and materials.

I had the car a week and did not note any drips on my garage floor before this however I did see the leaks when it was on the lift. I was told that the leak or seepage will normally occur for a long time before it is ever noted on the floor.


If you are leaking you can look at the underside, the underpinning of this car covers almost all of the bottom. The oil will show through as a stain.


Look here to get an example.

http://e89.zpost.com/forums/showpost...2&postcount=31
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      11-09-2017, 10:14 PM   #71
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Like a poster said, you should check it when you have your oil change. It's almost pointless to check via looking at your floor because most of these leaks are really 'sweating' and minor leakages, not the spilling out kind.
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      03-08-2018, 10:13 PM   #72
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I have a 2012 35i that was purchased in 2015 with 24k miles & CPO. I had the dealer look at mine in 2016 when I was getting the last covered service done. They reported some fluid but said it was from a vent tube. Fast forward to March 2018 - I had an Indi shop change the oil/filter and change out the brake fluid. They conducted a multi-point inspection and reported that the Mechatronic seal was leaking. They had $$$ in their eyes until I told them it was still under the CPO warranty until June. I then took it to the dealer for repair. They took care of it and also reported that the oil pan gasket was leaking. The car was there overnight because they were waiting on parts otherwise it would have been completed the same day. I can only hope that's the last of the leaks on the DCT.

HP
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      03-08-2018, 10:23 PM   #73
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Quote:
Originally Posted by Herkypilot View Post
I have a 2012 35i that was purchased in 2015 with 24k miles & CPO. I had the dealer look at mine in 2016 when I was getting the last covered service done. They reported some fluid but said it was from a vent tube. Fast forward to March 2018 - I had an Indi shop change the oil/filter and change out the brake fluid. They conducted a multi-point inspection and reported that the Mechatronic seal was leaking. They had $$$ in their eyes until I told them it was still under the CPO warranty until June. I then took it to the dealer for repair. They took care of it and also reported that the oil pan gasket was leaking. The car was there overnight because they were waiting on parts otherwise it would have been completed the same day. I can only hope that's the last of the leaks on the DCT.
Mechatronic seal???
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      03-09-2018, 01:22 PM   #74
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Quote:
Originally Posted by paris1 View Post
Mechatronic seal???
Are you questioning whether this is what was leaking?
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      03-09-2018, 01:54 PM   #75
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Quote:
Originally Posted by NoQuarter View Post
Are you questioning whether this is what was leaking?
No. I'm asking what it is.
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      03-09-2018, 02:09 PM   #76
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Quote:
Originally Posted by paris1 View Post
No. I'm asking what it is.
https://www.newtis.info/tisv2/a/en/e...x-dkg/CMRPFWMH
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      03-09-2018, 03:46 PM   #77
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Quote:
Originally Posted by NoQuarter View Post
OK! So it's a silver module thingy that resides in the bowels of a DCT. That was helpful, I guess...
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      03-09-2018, 03:53 PM   #78
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Quote:
Originally Posted by paris1 View Post
OK! So it's a silver module thingy that resides in the bowels of a DCT. That was helpful, I guess...
Right. This unit is similar in all the transmissions. It is the electronic/hardware interface that controls the transmission hydraulic solenoids that moves things around inside. It is often a leaky point in many of our BMWs (not just DCT)
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      03-09-2018, 06:02 PM   #79
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So I take it, since it lives under the "hydraulic cap" that when it leaks it's internal?
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      03-11-2018, 01:08 PM   #80
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Quote:
Originally Posted by paris1 View Post
So I take it, since it lives under the "hydraulic cap" that when it leaks it's internal?
The mechatronic unit bolts on the side, so it is not internal.
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      03-11-2018, 01:18 PM   #81
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OK; glad that's on your work bench and not mine. Looks scary complicated!
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