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      09-23-2016, 11:39 AM   #573
kylejdavidson
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Quote:
Originally Posted by sarcastrix
Replacement diff has arrived for my July build car - will get it installed next week
Wow, that's interesting. Where are you located? June build car for me and no word yet.
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      09-23-2016, 04:54 PM   #574
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Quote:
Originally Posted by Artemis View Post
FWIW, here you go, straight from the horse's mouth: 'Technical Action' document 0033990100 of July 19, 2016 (see the text highlighted in yellow).
(Source: here)

Quick translation:
"After the rear differential axle change it is additionally required to perform a break-in control [maintenance] (rear differential axle oil change after approx. 2,000 km [approx. 1,200 mi]) and to be charged under special diagnosis # 00 33 99 01 00.
It has to be pointed out to the client to observe the break-in procedure."

Anyway, ask your dealer to ensure checking with BMW whether this also applies in your country.

Thank you! This is just what I needed. I will be discussing with my dealer when I ask them to change the diff fluid again at 1200 miles on the new diff.
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      09-23-2016, 05:16 PM   #575
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I did hear a weird metallic noise coming from the rear of my car today, but I also had my old M235i exhaust and intake in the trunk so it could have just been them moving around and making the noise. I'll have to take them out and listen for anything else.
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      09-23-2016, 05:47 PM   #576
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Quote:
Originally Posted by MrBucket View Post
I did hear a weird metallic noise coming from the rear of my car today, but I also had my old M235i exhaust and intake in the trunk so it could have just been them moving around and making the noise. I'll have to take them out and listen for anything else.
Hm, yet another entry for the 'can crunch noise' list ?
http://f87.bimmerpost.com/forums/sho...5#post20402775
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      09-24-2016, 06:38 AM   #577
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Has anyone entered their VIN on the mybmw website, had it say that there are no open recalls for your vehicle, and still heard the crunch noise? I ask b/c my car was produced during the affected dates but the mybmw website says there are no open recalls for it. I guess I'll truly know once I drive it...
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      09-24-2016, 10:01 AM   #578
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Quote:
Originally Posted by Thespaz18
Has anyone entered their VIN on the mybmw website, had it say that there are no open recalls for your vehicle, and still heard the crunch noise? I ask b/c my car was produced during the affected dates but the mybmw website says there are no open recalls for it. I guess I'll truly know once I drive it...
Because this is not a recall and rather a "campaign", it will NOT show up on MyBMW.

Right now the only way to find out if via your dealer or calling up a Genius.
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      09-24-2016, 10:22 AM   #579
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Quote:
Originally Posted by gmzanatta
Quote:
Originally Posted by Thespaz18
Has anyone entered their VIN on the mybmw website, had it say that there are no open recalls for your vehicle, and still heard the crunch noise? I ask b/c my car was produced during the affected dates but the mybmw website says there are no open recalls for it. I guess I'll truly know once I drive it...
Because this is not a recall and rather a "campaign", it will NOT show up on MyBMW.

Right now the only way to find out if via your dealer or calling up a Genius.
Even if you ask your dealer or Genius, they don't have accurate information. I just picked up my 2017 M2 (July build, week 30) yesterday and in the first 175 miles heard the can crunch despite being told by both the dealer and Genius that my car did not have an affected differential.
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      09-24-2016, 10:55 AM   #580
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Quote:
Originally Posted by Artemis View Post
Hm, yet another entry for the 'can crunch noise' list ?
http://f87.bimmerpost.com/forums/sho...5#post20402775
I only heard it once and I did have the whole m performance muffler and a bms intake in my trunk so it could have been that shifting around. I will be on the lookout for it and also get the stuff out of my car so I can be sure its no items inside it causing the noise.
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      09-24-2016, 01:29 PM   #581
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Won't the dealer have to hear it themselves anyway? If it happens one time and can't be reproduced I doubt they would approve a new diff if you aren't on the initial list from pre July.
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      09-24-2016, 02:25 PM   #582
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Ok, my car is definitely affected by this differential issue, I'd heard the sound once last night, but then about 5 minutes ago it did it twice in quick succession driving about 10 miles an hour. It sounded exactly like crunching a soda can. First showed up at 663 miles and I've heard it twice in 5 miles since then.
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      09-24-2016, 04:40 PM   #583
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Quote:
Originally Posted by MrBucket
Ok, my car is definitely affected by this differential issue, I'd heard the sound once last night, but then about 5 minutes ago it did it twice in quick succession driving about 10 miles an hour. It sounded exactly like crunching a soda can. First showed up at 663 miles and I've heard it twice in 5 miles since then.
What was you build date?
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      09-24-2016, 04:41 PM   #584
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Quote:
Originally Posted by Swimfanrick
Quote:
Originally Posted by gmzanatta
Quote:
Originally Posted by Thespaz18
Has anyone entered their VIN on the mybmw website, had it say that there are no open recalls for your vehicle, and still heard the crunch noise? I ask b/c my car was produced during the affected dates but the mybmw website says there are no open recalls for it. I guess I'll truly know once I drive it...
Because this is not a recall and rather a "campaign", it will NOT show up on MyBMW.

Right now the only way to find out if via your dealer or calling up a Genius.
Even if you ask your dealer or Genius, they don't have accurate information. I just picked up my 2017 M2 (July build, week 30) yesterday and in the first 175 miles heard the can crunch despite being told by both the dealer and Genius that my car did not have an affected differential.
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      09-24-2016, 04:43 PM   #585
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Quote:
Originally Posted by CosmosMpower
So are August 1 and later builds affected or not?
Yes, You're buying a Lemon....
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      09-24-2016, 05:33 PM   #586
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Quote:
Originally Posted by MrBucket View Post
Ok, my car is definitely affected by this differential issue, I'd heard the sound once last night, but then about 5 minutes ago it did it twice in quick succession driving about 10 miles an hour. It sounded exactly like crunching a soda can. First showed up at 663 miles and I've heard it twice in 5 miles since then.
Don't worry, forum fellows. I never experienced it affecting the driving behavior of the car. So it's OK, except for the nuisance of that occasional rambling, screechy metallic noise - that's all.

My CA checked and confirmed that my car is not scheduled for a rear diff upgrade (yet). I guess it's only a matter of time before I'll get the replacement news. Almost 12K kms clocked in the meantime and my rear diff is still performing properly (apart from making those occasional 'grumpy' noises).
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      09-24-2016, 08:14 PM   #587
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Quote:
Originally Posted by PackPride85 View Post
What was you build date?
7/30/16 for my 2017
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      09-25-2016, 01:44 PM   #588
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Just picked up my car two days ago. The dealer's service writer told me my car would require replacement of the differential eventually and he had no idea of when the replacement diff would be available. He said that BMW would replace the diffs in priority based on need, i.e. the ones that are making the loudest noise get replace first. I doubt that. On the way home from the dealership I noticed that there was a whining noise each time I coasted to a stop with car in gear. The sound reminded me of the drive train noise made by the 1955 Chevy driven by James Taylor in the classic movie, "Two-Lane Blacktop". I know, the reference is weird, but honestly it made me think of that movie right away. I now have 102 miles on the car and the whining continues, but no can crushing noise.... yet!
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      09-25-2016, 02:03 PM   #589
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Quote:
Originally Posted by andrettifan View Post
Just picked up my car two days ago. The dealer's service writer told me my car would require replacement of the differential eventually and he had no idea of when the replacement diff would be available. He said that BMW would replace the diffs in priority based on need, i.e. the ones that are making the loudest noise get replace first. I doubt that. On the way home from the dealership I noticed that there was a whining noise each time I coasted to a stop with car in gear. The sound reminded me of the drive train noise made by the 1955 Chevy driven by James Taylor in the classic movie, "Two-Lane Blacktop". I know, the reference is weird, but honestly it made me think of that movie right away. I now have 102 miles on the car and the whining continues, but no can crushing noise.... yet!
99% sure thats the turbo spooling down. I hear it too.
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      09-25-2016, 02:52 PM   #590
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If technicians reused the original subframe bolts during rear diff replacement, the car needs to go back in to get new bolts (see here and here).

Re-recall...

Name:  Lalala_Cant_Hear_Cat.jpg
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      09-25-2016, 05:15 PM   #591
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Quote:
Originally Posted by Artemis View Post
If technicians reused the original subframe bolts during rear diff replacement, the car needs to go back in to get new bolts (see here and here).

Re-recall...

Attachment 1500050
Wasn't this related to the fact that BMW never sent new bolts with he new diffs to begin with?
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      09-25-2016, 05:25 PM   #592
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Quote:
Originally Posted by PackPride85
Quote:
Originally Posted by Artemis View Post
If technicians reused the original subframe bolts during rear diff replacement, the car needs to go back in to get new bolts (see here and here).

Re-recall...

Attachment 1500050
Wasn't this related to the fact that BMW never sent new bolts with he new diffs to begin with?
They sent diffs before the bolts but dealers were forewarned in giant, bold lettering not to reuse the bolts and to wait.

Some chose to act like that kitten.
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      09-28-2016, 08:41 AM   #593
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at least the re bolt recall makes "visible" the issue with the diff!

Funny they make a recall of an operation to fix an "no existing" recall
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      09-29-2016, 10:51 AM   #594
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Since picking up our Feb build car in April we have been experiencing a metallc rattle coming from the rear of the car on certain road surfaces. This is not the soda can noise others have been describing on here.
This was pointed out to the dealer at the 1200 mile service.
Subsequently the dealer had the car for 6 days over several further visits and racked up almost 200 miles (!) trying to trace it's origin. It had a new shock absorber fitted prior to them identifying the diff as the potential problem.
Last week it was returned after a three week wait to have the new diff fitted.
When I went to collect it I was informed that the diff had been fitted, but unfortunately it was not a compatible fit with the propshaft!
Our car is now having the original diff re-fitted whilst a new one is ordered -again!
Still... We have the delights of a 218d whilst it's in the sick bay...
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