12-23-2021, 05:14 PM | #1 |
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2021 M4 Comp (G82) - Cold Start noises
Hey everyone, I have an appointment mid January for my car because it's making a temporary squealing noise 5 - 7 seconds after a cold start (not every time) now that it is colder (under 40 F). And it lasts for 20 - 30 seconds and then goes away for 24 - 48 hours.
I feel like I'm chasing a "noise ghost" here but if you listen to the noise, you'll hear what I'm talking amount. The dealership says unless they can reproduce, there may not be anything to be done. So, posting here to see if there are any thoughts. 7800 miles on the Odometer, bought it April 2021. https://1drv.ms/u/s!AjjPLhUufp5AgtBke9jWImdh4rFc6A |
12-23-2021, 07:00 PM | #2 | |
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XanaduRegio20.50 |
12-23-2021, 07:27 PM | #3 |
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Sounds like a pully or belt tensioner to me. #dealervisit
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Limegrntaln13021.50 XanaduRegio20.50 |
12-23-2021, 07:33 PM | #4 | ||
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Limegrntaln13021.50 |
12-23-2021, 07:37 PM | #5 |
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Yeah, Im with BIGWORM. Belt tensioner, or pulley
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XanaduRegio20.50 |
12-23-2021, 07:48 PM | #6 | |
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I'm glad I shared this here and will have the shop foreman check both tensioner and pulley. I'll write back with an update by the end of January. Happy holidays! |
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Limegrntaln13021.50 |
12-24-2021, 01:48 AM | #7 |
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I’m hearing the exact same sound. Started becoming more noticeable once the temperatures dropped… will probably follow up soon..
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XanaduRegio20.50 |
12-24-2021, 09:05 AM | #8 |
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12-25-2021, 08:57 PM | #9 |
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Yes, 2022 m3 x drive. I’ve had it for 3 months now but only started noticing it a month ago. May be due to temperature.
A little off topic.. but if you are also in a xdrive, have you noticed any diff binding feeling? Mine went away when I changed to winter tire/wheel set up but wondering if this is common… (19inch square with vredstein wintrac pro). |
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12-25-2021, 10:07 PM | #10 | |
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I have a '21 M4 Comp (non-xDrive). Hmm, I would say make a specific post about that one, sounds interesting. |
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01-19-2022, 09:37 PM | #11 |
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Update: Would you guess, the weather is warmer now, not reproducible by either myself or the BMW Service Center. I will have to wait until it is cold again. :-(
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01-20-2022, 05:29 AM | #12 |
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I have had both the squealing and the front diff binding sensation.
The squealing is when it is cold for a few seconds. Not worried about it. The diff binding is any time I am pulling out of a parking spot with the wheel at or near full lock. The front end of the car shifts and it is pretty noticeable. I havent decided if this is worth a trip to the dealer or if it is normal. My jeep with a front locking dif would do the same thing if it was in 4WD on pavement - which was to be avoided. |
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01-21-2022, 08:01 PM | #13 | |
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01-22-2022, 08:14 PM | #15 | |
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One question I have is, if you turn the wheel all the way til it stops, how far do you have to turn it back before driving off for the issue to not reproduce. I.E. find the scope/range of the issue. If this is something you really want to discuss though, I recommend starting a new post. |
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12-25-2022, 12:33 PM | #16 |
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Reviving old thread. Just noticed with the recent large temperature drop that my new 2023 is making this exact sound on cold start/idle. Was this ever figured out? I am scheduled to have my 1200 mile service on Tuesday 12/27 and also added this to requested service. If no response I will report back my findings.
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12-27-2022, 05:23 PM | #18 |
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My car is currently in service, they wanted to keep it overnight to diagnose it, do 1200 mi service, and correct my off-center steering wheel. I will report back what the sound is once they replicate it and correct. It echoes throughout my apartment complex when I start it -- embarassing! Lol
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12-28-2022, 03:20 PM | #19 | |
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Do you or anyone else have aftermarket intakes?
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12-28-2022, 07:12 PM | #20 |
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Interesting not what I expected. I have BMS drop in filters in the stock air boxes. Can’t imagine changing out filters would cause that problem. I haven’t had a chance to get to the dealer due to work schedule. Anyone else?
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12-28-2022, 09:37 PM | #22 |
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I was considering switching back to stock to see if it still occurs. I just don't trust the diagnosis quite yet
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