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E90/E91/E92/E93 (2006 - 2013)
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  #1  
Old 10-25-2013, 09:39 AM
goldcoast028 goldcoast028 is offline
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Uh OH!!!! What happened here?

I have a 2007 335i with 80,000 Miles

As I was driving I heard a loud rattling sound coming from the engine bay, especially anytime I accelerated at all. I assumed it may have been related to the waste gate that had been replaced so I gave my dealership a call on this Monday to have it checked out on Saturday.

Last night as I am pulling into my place the Rattling gets really loud, then stops. The BATTERY light comes on, there is no power steering, the brakes become hard, I am still able to drive the car with great difficulty at the low speed. My warranty just ended in April, part of me is hoping it is Turbo related since that is still under warranty.
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  #2  
Old 10-25-2013, 09:47 AM
Tom K. Tom K. is offline
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Battery light, no power brake assist and no power steering assist are most likely due to a broken serpentine belt. A quick look under the hood will confirm.

Tom
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  #3  
Old 10-25-2013, 10:08 AM
goldcoast028 goldcoast028 is offline
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Thank you for the extremely quick reply, I will take a look after work. I believe the was a recall issue was it not for the N54?
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  #4  
Old 10-25-2013, 10:19 AM
surfcity335i surfcity335i is offline
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Quote:
Originally Posted by goldcoast028 View Post
Thank you for the extremely quick reply, I will take a look after work. I believe the was a recall issue was it not for the N54?
And remind the dealer that there is a TSB (should be a recall) on the issue of the power steering pulley rubbing on the cross-member and cutting the belt. If there are signs of this, ask BMWNA for assistance.
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  #5  
Old 10-25-2013, 10:45 AM
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DSXMachina DSXMachina is offline
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The belt loss may be due to the belt tensioner coming apart, expect there to be costs for that as well. All in all, no big deal and the belt should have been changed by now anyway. You'll have your car flatbedded to the dealer, right? Shouldn't drive it.
At this point you have not done any other damage unless the belt wrapped itself around something, like a python, and did bad things to it.
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  #6  
Old 10-25-2013, 10:46 AM
goldcoast028 goldcoast028 is offline
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Thank you guys, I have had a flatbed pick it up and take it to the dealership for inspection. I appreciate the info and the quick replies
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  #7  
Old 10-25-2013, 10:55 AM
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BostonB6 BostonB6 is offline
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Quick bit of advice, when talking to the dealership, you may want to leave out the part about you continuing to drive it with the sound. Don't give them an excuse to deny repairs because you continued to drive it with a racket coming out of the engine compartment....although that does seem to be a bit of a questionable decision on your part. No way of knowing how much additional damage occurred because of that.
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  #8  
Old 10-25-2013, 10:56 AM
surfcity335i surfcity335i is offline
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http://www.e90post.com/forums/showthread.php?t=737958
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  #9  
Old 10-25-2013, 05:12 PM
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DSXMachina DSXMachina is offline
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Originally Posted by surfcity335i View Post
Unlikely. The OP described a loud rattle on acceleration which seems to have come on rather soon. His symptoms don't really mesh with the TSB. We'll know soon enough.
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  #10  
Old 10-25-2013, 05:25 PM
hondo402000 hondo402000 is online now
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AHHH, another just out of warranty failure,,

well seems BMW knows how to make cars that last just 4 years and 1 day or 50,000 and 1 mile
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  #11  
Old 10-25-2013, 07:27 PM
roadkillrob roadkillrob is offline
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Originally Posted by hondo402000 View Post
AHHH, another just out of warranty failure,,

well seems BMW knows how to make cars that last just 4 years and 1 day or 50,000 and 1 mile
That is German engineering for you, they can expire it the day warranty runs out!
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  #12  
Old 10-25-2013, 10:19 PM
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CALWATERBOY CALWATERBOY is offline
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AHHH, another just out of warranty failure,,

well seems BMW knows how to make cars that last just 4 years and 1 day or 50,000 and 1 mile

Maybe....what's the schedule for belt replacement?
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  #13  
Old 10-26-2013, 05:08 AM
roadkillrob roadkillrob is offline
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Maybe....what's the schedule for belt replacement?
It seems like 50 or 60k is the recommendation - BMW says it will last the life of the car 100k+ like most things they don't want to pay for - official number is 120,000 miles with an inspection of it every 30k miles.
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  #14  
Old 10-26-2013, 05:17 AM
grijo grijo is offline
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Originally Posted by BostonB6 View Post
Quick bit of advice, when talking to the dealership, you may want to leave out the part about you continuing to drive it with the sound.
Yeap. Applies to any vehicle. If you notice sounds that are not typical for the vehicle, it is time to open the hood and look around. If you cannot see the problem, flatbed the vehicle to your indie or dealer.
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  #15  
Old 10-26-2013, 05:46 AM
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DSXMachina DSXMachina is offline
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Quote:
Originally Posted by roadkillrob View Post
It seems like 50 or 60k is the recommendation - BMW says it will last the life of the car 100k+ like most things they don't want to pay for - official number is 120,000 miles with an inspection of it every 30k miles.
Quote:
Originally Posted by CALWATERBOY View Post
Maybe....what's the schedule for belt replacement?
Here's my experience. Regardless of who made the car an oem belt will easily last 60K miles and 9 out of 10 will last 90K miles. When they fail depends on several variables.
Probably the worst thing for a belt is heat, so those in the southwest deal with tougher conditions than the northeast. Then there's load. Power steering pumps, ac compressors and alternators all stress the belt. The more stress the faster the cords will break down. Lastly is failure due to something else such as pulley bearing failure or tensioner failure, or oil soaking the belt.
Serp belts are extremely rugged, and a heck of an improvement over the old V-belts which had to be retensioned every year or so. They are mission critical components (failure will stop you where you are) and I suggest to my customers that they be changed every 5 years or 90K miles. Note that with average driving 5 years will probably be at less than 75K miles.
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  #16  
Old 10-26-2013, 06:14 AM
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need4speed need4speed is offline
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Originally Posted by hondo402000 View Post
AHHH, another just out of warranty failure,,

well seems BMW knows how to make cars that last just 4 years and 1 day or 50,000 and 1 mile
Yes, but how do they know which will opt for an extended warranty? Someone with ESP deep inside the Welt? N4S
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  #17  
Old 10-26-2013, 07:31 AM
fdriller9 fdriller9 is online now
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Quote:
Originally Posted by surfcity335i View Post
And remind the dealer that there is a TSB (should be a recall) on the issue of the power steering pulley rubbing on the cross-member and cutting the belt. If there are signs of this, ask BMWNA for assistance.
A service bulletin (TSB) is NOT a recall. A recall must be repaired on all cars falling under the recall by law. A service bulletin only documents a common problem and lists common symptoms, known fixes, etc.

A dealer DOES NOT have to cover a TSB if the car is out of warranty. Even if the car is under CPO warranty, if the warranty doesn't cover what the TSB documents, it's not covered.

Is there any oil on the belt or pulleys?
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Last edited by fdriller9; 10-26-2013 at 07:32 AM.
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  #18  
Old 10-26-2013, 06:55 PM
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CALWATERBOY CALWATERBOY is offline
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Quote:
Originally Posted by DSXMachina View Post
Here's my experience. Regardless of who made the car an oem belt will easily last 60K miles and 9 out of 10 will last 90K miles. When they fail depends on several variables.
Probably the worst thing for a belt is heat, so those in the southwest deal with tougher conditions than the northeast. Then there's load. Power steering pumps, ac compressors and alternators all stress the belt. The more stress the faster the cords will break down. Lastly is failure due to something else such as pulley bearing failure or tensioner failure, or oil soaking the belt.
Serp belts are extremely rugged, and a heck of an improvement over the old V-belts which had to be retensioned every year or so. They are mission critical components (failure will stop you where you are) and I suggest to my customers that they be changed every 5 years or 90K miles. Note that with average driving 5 years will probably be at less than 75K miles.

Makes sense!

What's Serp? Sounds like goat weave.

Serp like a Harley [Sturgis] belt? 'Course, that's hog hair. Maybe stout enough for the serpentine path BMW belts.....ah....wait a minute....wait just a minute....

.

Last edited by CALWATERBOY; 10-27-2013 at 07:32 AM.
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  #19  
Old 10-27-2013, 12:51 AM
avocet avocet is offline
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Sounds like the rattling was a failing tensioner or bearing which precipitated belt failure .
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