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      11-17-2017, 07:14 AM   #1
sixer
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335d Xdrive -1st Service - Gearbox leak!

Hi all
Took my 335d in for its first service at 14k miles and they have spotted a gearbox oil leak! They said it may be the transfer box but need to investigate further.

Any idea what this could be or if there are any known issues?

Does anyone know what this job will do entail?

Taking it back in next week for investigation.

Thanks
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      11-17-2017, 08:19 AM   #2
onstat
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Ive currently got the same on mine after a first service. It was described as a "misting" rather than a leak! lol

Mines going in beginning of December for 2 days to have the gasket replaced which is the fault.
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      11-17-2017, 08:26 AM   #3
sixer
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I was assuming a duff seal too but not sure. Itís a slight weep rather than a dripping leak from what I can see. Wondered if they would refresh the full fluid as part of the job?
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      11-17-2017, 08:47 AM   #4
Mr Whippy
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Interesting to know.

Fingers crossed it's an easy fix.

They'll replace fluid I'd hope. Risk of contamination is too high otherwise.
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      11-17-2017, 11:34 AM   #5
Jeff123
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This happened to me a couple of cars (BMW) ago. Saw a few spots of pink fluid on the drive and mentioned it to the dealer. They reckoned that it would need new oil and everything tightening up - quoted £180. I rang 2 indies who said that just tightening things up would not solve the problem and quoted me £360 to replace some type of tray/cover as well.

In the end I opted for the main dealer solution and it seemed to work, at least for the 18 months after that until I sold the car.
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      11-18-2017, 12:32 PM   #6
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Have you done any/many launches?
14k is quite low by my standards.
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      11-18-2017, 12:46 PM   #7
sixer
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Nope none! Agreed 14 is low
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      11-18-2017, 12:52 PM   #8
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none here too. good job really!
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      11-19-2017, 10:37 AM   #9
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I think the gearbox is pretty much a single casting, with a plastic sump bolted to a machined surface underneath. There is also a wiring harness seal that could have popped out, and on xDrives the rear section has the transfer box add on, which is a mating face. I guess there are cooling pipes somewhere too.

So in other words, not many areas where it can leak as it is one big casting.

My bet would be the plastic sump.
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      11-19-2017, 10:46 AM   #10
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I had exactly this 'fault' on my 2013 car - identified at the first service, fixed and never heard any more about it.
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      11-20-2017, 04:41 AM   #11
sixer
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The tech at BMW dealership suggested it may be the transfer box (assuming he meant seal). Hopefully an permanent fix can be done.
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