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  1. F30 / F31 / F32 / F33 / F34 / F36 (2012 - current)
    Hi all, Wondering if anyone could be of help in diagnosing the cause of this noise. Only occurs for the first 30-60 seconds after a cold startup. The car has been to multiple garages but nobody has been able to diagnose it as the car has been warm when arriving. Has been making this noise...
  2. X5 E53 (1999 - 2006)
    My E53 is making a horrible whistle noise right after warm start. It lasts for about 2 minutes. The car seems to work fine besides the noise. Below are the symptoms. Anyone has any ideas what might be causing it? ● Cold start: no problem ● Warm start: whistle starts after a few seconds ●...
  3. F10 / F11 (2011 - 2016)
    Ive had this whistle for a few months, and replaced the PCV valve a few weeks ago, because that was the only diagnosis I could find online. I had done the flame test and it indeed was sucking in, and post repair it does not suck in anymore. I understand this to be normal behavior. However...
  4. X3 E83 (2004 - 2010)
    Hey all, first post here. I have been reading this forum for a while, although I have not yet contributed. This x3 is my first car (after years of riding/DIYing all kinds of mopeds/small motorcycles), and I absolutely love driving it. I have been trying to figure out this issue for a while, and...
  5. F22 / F23 2 Series (2014 - Current)
    Hi, I have a whistling noise in the car every time its at 30mph. then till 33~34mph it pitches up and then disappears. Only happens in cold weather so below 18C. Dealership service has no clue what it is. I still can't figure out where it's coming from. Blowoff valve changed, still the same, so...
  6. F30 / F31 / F32 / F33 / F34 / F36 (2012 - current)
    Hey, I'm getting a really faint whistling noise from the engine bay I think. When coasting or accelerating or de-accelearting. It is faint. But I can't hear it on the outside or idle. Only when in cabin. It had recently been jacked up with wheels taken off.
  7. X3 E83 (2004 - 2010)
    My X3 has started to make a very loud whistling noise. This occurs with the radio and climate control off To summarize: Replaced intake boot <1 year ago (torn) Replaced 2x vacuum caps <1 year ago (completely cracked) Replaced DISA O-ring <1 year ago Only on cold days (<20 F/ <-7C) Sound from...
  8. X5 E70 (2007 - 2013)
    Hi All, I bought my 2010 X5d with Premium, Technology and Cold Weather package as a CPO with 35k miles on it back in Jan 2013 for a very reasonable $36k. I now have 72k miles on the odometer. This is my first BMW after only ever having owned Japanese/Korean cars. I've had the car for 3 years...
  9. X5 E53 (1999 - 2006)
    So, while driving my '04 X5 3.0i, E53 (GM automatic transmission), it went into transmission failsafe, and I read error code P0733. Ref: http://engine-codes.com/p0733_bmw.html Starting the troubleshooting from the cheap possibilities: I did a partial transmission fluid change (without pan...
  10. E60 / E61 (2004 - 2010)
    Sometimes after starting the engine there is a whistle like the kind a gym teacher uses coming from the dashboard. It only lasts for about 5 seconds and sometimes just for an instant. It seems like one of the little computer cooling fans might be coming on for test and maybe a bearing is going...
  11. X3 F25 (2011 - 2017)
    I have a semi-new X3 35i and have always had wind noise (a high whistle) sound when I hit about 65mph on the freeway and it is really noticeable around 70mph. It's loud enough that i have to turn up the music to drown it out -- listening to spoken word audio is too annoying. I finally brought...
  12. E39 (1997 - 2003)
    I've had a whistling sound whenever I moderately accelerate in my '00 540i. I'm thinking it's an intake leak, but I'm not sure exactly where to start. What are some easy-to-do leak checks and common failure points? Are there any other things that could cause this?
  13. X5 E53 (1999 - 2006)
    I have a 2005 X5 with approx 35k miles. I noticed there is a whistle that occurs when I accelerate slowly at lower speeds. If I punch it, it is not there. I saw another thread relating to a 3 series sedan with the same issue that said that it was the crank case vent valve. Any thoughts?
  14. E46 (1999 - 2006)
    I have a 2002 325i with 119K. The last couple of days I have noticed a high pitched whistling noise coming from the engine bay. It only whistles around 2000 - 3500 rpms and only lasts for about 5 mins after start. I thought it may be the wheels or brakes, but the noise is still there in...
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