01-09-2023, 09:49 PM | #23 |
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Taking my car back in tomorrow to see if it can be replicated. Switched to stock intakes and the noise still occurs when colder out. Sometimes I have difficulty replicating the sound, but holding out hope that they can diagnose it. Something does not sound right that's for sure.
Thinking it actually sounds a lot like the secondary air pump whistle I have heard on E46's. Will see if they can replicate the sound. Told them keep it as long as they need as I have a spare car. Hoping they figure this out!
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2022 Acura TLX Type S, Tiger Eye Pearl with Orchid White interior (traded in) 2019 Subaru WRX STi, Ice Silver (traded in) 2017 Ford Focus ST, Oxford White (traded in) Last edited by Krisp97; 01-11-2023 at 05:06 PM.. |
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01-10-2023, 12:08 PM | #24 | |
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01-11-2023, 05:08 PM | #25 |
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Car is at BMW the last few days, they have finally briefly replicated the sound, still trying to pinpoint it. Unfortunately the weather has warmed up and that makes less likely to happen.
Service advisor said that they will continue trying until they figure it out. I smell a TSB in the works since others are having similar issues! I have yet to see someone report back as to what exactly is causing the squealing/whistling sound on cold start, so I am on a mission.
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2023 M3 Competition xDrive, Alpine White with Full Fjord Blue/Black interior
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01-13-2023, 09:49 AM | #26 |
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They have been cold starting it once a morning trying to replicate the sound, they have narrowed it down today. The tech thinks it is a pulley sound, the sound went away before he was able to identify which one.
They are going to try again this afternoon. I thought all along this was a pulley sound! Kind of frustrating but still grateful they have been persistent in trying to figure this out. Will report back once I have an answer in hopes of helping others with the same issue EDIT: They have decided to replace the belt to see if it fixes the issue before going further such as pulley replacement.
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2023 M3 Competition xDrive, Alpine White with Full Fjord Blue/Black interior
2022 Acura TLX Type S, Tiger Eye Pearl with Orchid White interior (traded in) 2019 Subaru WRX STi, Ice Silver (traded in) 2017 Ford Focus ST, Oxford White (traded in) Last edited by Krisp97; 01-13-2023 at 08:19 PM.. |
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01-20-2023, 02:47 PM | #27 |
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The belt was replaced. They tested it again with the recent drop in temperature, the noise has persisted.
I was contacted by the service manager and told they are opening a case with BMW NA and plan on getting audio clips of the sound to submit over. I am two weeks in without having my car, luckily have a second car to drive in the meantime. I am eager to hear what they determine this to be. It is frustrating, but they have been nothing short of helpful and determined.
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2023 M3 Competition xDrive, Alpine White with Full Fjord Blue/Black interior
2022 Acura TLX Type S, Tiger Eye Pearl with Orchid White interior (traded in) 2019 Subaru WRX STi, Ice Silver (traded in) 2017 Ford Focus ST, Oxford White (traded in) |
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01-03-2024, 09:00 PM | #29 |
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I have not, it is intermittent, only when first started in the cold weather such as in the low 30's Fahrenheit and below. Not once at operating temp or warmer climate.
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01-17-2024, 09:17 AM | #31 |
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I actually notice this sometimes as well. It seems to go away after a few seconds though. I don't think it's an issue.
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02-26-2024, 09:43 PM | #33 |
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did we ever get to the bottom of this? temps dropped to -20C and heard the same squealing noise and jumped straight to the forums. I’ll see if I can record a sound clip later tonight
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