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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N57 / M57 Turbo Diesel Discussions - 335d > 2011 335d - Occasional Belt Squeal at Start Up



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      06-14-2011, 08:08 AM   #23
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Originally Posted by taibanl View Post
Thanks cssnms. Seems my dealer is going to require me to bring it in anyway before ordering parts. Is there any important verbage in the diagnosis?
No problem. Other my description of the initial complaint and description to replace the parts described above no other verbage.

I will say when I dropped my car off originally the dealer called me and said they could not duplicate the noise. I was afraid of that, considering the squeal was only intermitent and only occurred under certain conditions. I knew it made the noise at start up with the AC button depressed every late afternoon after my car had been sitting out in the hot sun all day, so I went up to the dealer the same day about right around the same time it always happens and asked the CA to take me to my car so I could start it for him, because I would be damned if I was going to leave it there any longer or put up with the squeal. Well, I got it in it, popped the hood, made sure the AC was on and then cranked it up... Sure enough not 5 seconds after start up it started SCREEECHING like a mother.

BTW, I am still waiting for the call back from the dealer that my parts are in. Approaching 10 days now.
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      06-20-2011, 11:05 PM   #24
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This is a relatively QUIET example of this horrible noise (It was much louder when I first started the car)
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      06-21-2011, 08:28 AM   #25
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      06-28-2011, 10:55 AM   #26
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Must be something with the Alpine White... My 2011 335d is in the shop right now for the exact same problem. I think it's the a/c compressor. Seems to draw a lot (mph gauge), about 5-7mpg... I hope its nothing serious, and that the dealer diagnoses it right. (crossing fingers)

Last edited by Deezl; 06-28-2011 at 01:19 PM.
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      08-13-2011, 04:14 PM   #27
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belt needs to be changed

Took my D in 9000 miles same squeal when AC kicks on in after start for ~10 seconds, evil sound really. Service advisor said AC belt separate from other belt and is known cause of the problem. They need to use a narrower belt than the stock AC belt, that had to be ordered. I will let you know part number when they replace it next week.
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      08-13-2011, 09:26 PM   #28
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After having my belts, tensioners and pullies replaced, the SQUEAL is back. It seems as though a few dealers are intalling an aftermarket belt to address the issue. For those that have had the aftermarket belt installed it's still to early to tell if it addressed the fix or not.

BTW, this thread needs to be moved to the diesel subforum.
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      08-19-2011, 05:09 PM   #29
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New Belt

They replaced the belt today. Interestingly they did not give invoice. New belt is front belt, MutiRib 325K-4. Made in Korea. SO far so good.
From what I can find, the new belt is 5mm shorter than stock.

Last edited by archaicbark; 08-19-2011 at 05:18 PM. Reason: spelling horrible
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      08-20-2011, 09:13 AM   #30
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Keep us posted how that aftermarket belts holds up over the next month or so. It seems that more dealers are going with this fix now.
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      08-20-2011, 10:30 AM   #31
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Its probably a bad bearing in one of the tensioners. Them ordering all the parts is most likely them being precautionary, since they had to come from Germany.
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      08-20-2011, 11:28 AM   #32
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Quote:
Originally Posted by Wires View Post
Its probably a bad bearing in one of the tensioners. Them ordering all the parts is most likely them being precautionary, since they had to come from Germany.
No. I had all of the tensionors and belts replaced, squeal came back. BMW appears to have deduced the problem to the OEM belt that is stretching to much, thus the need to order a shorter aftermarket belt.
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      08-21-2011, 10:29 AM   #33
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That's odd. On the domestic veichles I've had, the tenstioners on the serpentine belts are really forgiving to stretch.

Never heard of a problem like that before. Not saying it isn't happening, just never heard of it.
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      08-21-2011, 10:47 AM   #34
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Quote:
Originally Posted by Wires View Post
That's odd. On the domestic veichles I've had, the tenstioners on the serpentine belts are really forgiving to stretch.

Never heard of a problem like that before. Not saying it isn't happening, just never heard of it.
It appears to isolated to the "d." It also appears to be more common then many first realized. I guess after BMW paid to replace one to many tensionors, pullies, and belts only to have customers come back with the same problem weeks later they finally seem to have it narrowed down to the belt. Hopefully this does it. I am waiting on long term updates from those that have had the aftermarket belt installed before I take my car back to the dealership.
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      09-08-2011, 10:08 AM   #35
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Yeah, I've started experiencing this too on my '11 335d with 8K miles. Every morning in 70 degree weather, when I turn the car on and also have the A/C turned on I hear this sound. Every single day. I think it is time I take it in to the dealer. Any one else notice this in their cars? Is this the (HPFP-like) issue that is going to plague the "d"?
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      09-10-2011, 01:36 PM   #36
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A survey on the 335d and the belt squeal issue. Please fill up the form here:

https://docs.google.com/spreadsheet/...MWJFWnBUQWc6MQ

Thanks
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      09-16-2011, 12:54 AM   #37
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my car was at the dealership for 3 days. they replaced the A/C belt with an aftermarket belt. seems to be this: http://goo.gl/AP3q1

K040325 A/C BELT

the issue seems to have gone away. hope it doesn't come back again.
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      02-14-2012, 03:15 AM   #38
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V Belt

I experienced the squealing noise upon start up of the car - lasted for a while and then disappears. Quite embarrasing given my car was brand new. Still under warranty I took the car to BMW and they changed the vbelt. Within a 6 month period the same noise occured and I took the car back to the dealership, they changed the v belt again, well at least thats what they said.The service lady told me that the supplier gives them poor quality products and they dont know why.I expected top quality products from BMW and nothing less. Clearly this is not happening.Its been 14 days now and BMW customer service have not called me to explain.
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      02-14-2012, 10:44 AM   #39
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Quote:
Originally Posted by Janu View Post
I experienced the squealing noise upon start up of the car - lasted for a while and then disappears. Quite embarrasing given my car was brand new. Still under warranty I took the car to BMW and they changed the vbelt. Within a 6 month period the same noise occured and I took the car back to the dealership, they changed the v belt again, well at least thats what they said.The service lady told me that the supplier gives them poor quality products and they dont know why.I expected top quality products from BMW and nothing less. Clearly this is not happening.Its been 14 days now and BMW customer service have not called me to explain.
I too had the belt replaced w/an OEM belt and the noise returned shortly thereafter. Given the number of complaints regarding this issue there was a PUMA case opened in 2011 and a new aftermarket belt was spec'd. According to other owner's this belt solved the problem for them.

I have yet to take my car back to the dealer to replace the belt with the latest belt fix since the squeal only happens during hot summer months, so I have not had to deal with the noise for a few months.

Did you get your belt replaced either time with the aftermarket belt?
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      03-27-2012, 12:22 PM   #40
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My belt squeal fixed

Hey Guys
I took it in with the same issue. The service dept mgr said that there is now a tech bulletin on it.

All they did was replace the part. Im not 100% clear with this Service description so take out the areas that you know. Heres the Text.

Caused by SIB 640811
Corrected by 1128050: (1128033900 A/C Ribbed Belt / Replace

Installed 11 28 7 520 177 : Ribbed V Belt

Replaced Belt per SIB 640811

Ill let you know if it returns....but for now..no problems....notice they didnt change any pulleys or tensioners...
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      03-27-2012, 09:08 PM   #41
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Yes there is a bulletin on it. BMW came up with an aftermarket belt as a replacement. So far I have not heard of any recurrances from those that had their belt replaced.

--- MOVE TO THE DIESEL SECTION.
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      03-28-2012, 11:53 AM   #42
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Guys,

There is a just slightly shorter belt (part # 11-28-7-520-177) that may dealer installed recently, and most of the dealers are not aware of that. Unfortunately my car was hit in the parking lot and was sitting in the shop for two weeks so I donít know if the noise is gone. Iíll report later is the noise is gone.
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      05-11-2012, 11:50 AM   #43
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Yay, add me to the club!





Starting doing this a couple weeks ago (21k miles on the clock now). This is just after starting up and pulling out of the parking space.
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      05-11-2012, 01:05 PM   #44
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Quote:
Originally Posted by Thud View Post
Yay, add me to the club!


Starting doing this a couple weeks ago (21k miles on the clock now). This is just after starting up and pulling out of the parking space.
Welcome to the club Thud!
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