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      05-03-2020, 12:59 AM   #1
dbs600
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Low / Deep Rattle / Reverb Noise

Any insight / thoughts / guesses as to what this noise may be?



It’s a low / deep delayed resonating rattle / reverberation after driving over imperfect roadway / road ruts, but most easily reproducible over speed bumps.

Sometimes seems like it’s coming from the front, but other times feels like it may be coming from the rear. Nonetheless, emanating from under the car.

The dealer has not been able to pinpoint / resolve, which is very upsetting.

Thank you.

Last edited by dbs600; 05-03-2020 at 01:14 AM..
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      07-12-2020, 01:15 PM   #2
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Hi everyone,

Hope all is well.

Dealer replaced both front wheel bearings and both upper and both lower control arms.

I was told the car was ready for pick up, but upon a road testing to ensure the noise was gone, it’s now worse than before!

How the dealer told me the car was ready is beyond me. They apparently did not road test after the work!

They then get back to me stating the radiator support is cracked and has play, which would be an additional $1,500.

I visit and they show me the crack. Pictures attached. I google and find part number 17117575245, which retails for less than $200. Not sure where they get $1,500 for a less than $200 part? Could they really think I’d believe there’s a whole work day of labor involved?

The play is such that if you push up on the support where it’s cracked, it shifts up, whereas it doesn’t on the side that’s not cracked.

I suppose the front bumper needs to be removed to see what if anything else is damaged, but any thoughts on whether or not this one part is likely the cause of the sound?

Also, is this one part the only part holding the radiator in place, or are other parts holding it in place as well? (meaning that those other parts may be damaged too)

Guess I’ll need to take the car to a body shop. :|

Thank you.
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      07-12-2020, 01:36 PM   #3
13M5F10
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I had a similar sound, seems the lower control arms and wishbone were replaced and fixed my issue.

Regarding that quote, that's typical of the stealership. They like to use book time vs actual. I remember paying $600 for a $50 part.

I just installed a full brake package kit. They quoted me $1900 just for labor. I had an Indy shop do it for $475. Major different.

Defiantly go to an Indy shop. That's an easy job.
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      07-12-2020, 08:09 PM   #4
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Quote:
Originally Posted by 13M5F10 View Post
I had a similar sound, seems the lower control arms and wishbone were replaced and fixed my issue.

Regarding that quote, that's typical of the stealership. They like to use book time vs actual. I remember paying $600 for a $50 part.

I just installed a full brake package kit. They quoted me $1900 just for labor. I had an Indy shop do it for $475. Major different.

Defiantly go to an Indy shop. That's an easy job.
Thank you very much, 13M5F10.

As an aside...

I'm also seeing on the RO that the left front spring was replaced, and that the thrust arm bushings were recommended, but not replaced...(?)

If that makes any difference?

Thank you.
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      07-12-2020, 10:30 PM   #5
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Quote:
Originally Posted by dbs600 View Post
Quote:
Originally Posted by 13M5F10 View Post
I had a similar sound, seems the lower control arms and wishbone were replaced and fixed my issue.

Regarding that quote, that's typical of the stealership. They like to use book time vs actual. I remember paying $600 for a $50 part.

I just installed a full brake package kit. They quoted me $1900 just for labor. I had an Indy shop do it for $475. Major different.

Defiantly go to an Indy shop. That's an easy job.
Thank you very much, 13M5F10.

As an aside...

I'm also seeing on the RO that the left front spring was replaced, and that the thrust arm bushings were recommended, but not replaced...(?)

If that makes any difference?

Thank you.
Not sure. I think for me it was a guessing game for bmw since. It was my third time there for the issue.
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      07-13-2020, 11:39 AM   #6
dbs600
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Okay; thank you very much.
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      06-30-2021, 09:14 AM   #7
dbs600
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Hi everyone,

Hope all is well and that you’re staying hydrated during this heat wave.

To resolve the noise referenced in this thread, the following part needs to be replaced on my 2011 F02 BMW 750Li xDrive:

https://www.ecstuning.com/b-genuine-...r/17117575245/

It's the radiator housing / support / carrier, which the radiator slips into.

Can someone please let me know what work needs to be done to access the part so it can be replaced?

I’m going to have the dealer replace it because they’re already going to be replacing the radiator, but I’d like some insight as to what other labor may be needed to get to this part and replace it as well (so to ensure the dealer isn’t charging for overlapping time they're already covering for the other work).

The following work is going to be done at this time:

OIL COOLER LINES
REAR MAIN ENGINE OIL SEAL
RADIATOR
STARTER
FRONT AND REAR MOUNTS
TENSION STRUTS

If you can provide insight as to any overlapping labor and what if any additional labor may be needed to get to the radiator module carrier; it would be extremely helpful.

Please kindly advise at your earliest convenience.

Thank you so very much.

My best.
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      08-13-2021, 04:52 PM   #8
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Have you had this work done yet?
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      08-14-2021, 12:55 PM   #9
dbs600
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Quote:
Originally Posted by hunterp27 View Post
Have you had this work done yet?
Thanks for your message.

Yes, the work was done.

The 'module carrier' was the culprit.

I paid 2 hours of labor to replace same.

All is good again, thankfully.

Happy about it!
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