03-10-2016, 05:39 PM | #23 |
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Whoa, wrong differential?? How does that happen? What build week and where?. Curious. I just picked up my 6MT yesterday and acceleration seems tame compared to my 335is thus far. Of course I'm not getting on it while breaking in but I am curious about this. I assume they would have caught this at Port last week or at dealer but who knows...
I'll need to take a listen for the squeeking noise. Good luck! |
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03-10-2016, 08:24 PM | #24 |
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I was driving in my other car while the wife drove the 340i. I can def hear it. Oh well. Gonna wait and see if BMW will make a TSB for it. Whatever it may be.
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03-11-2016, 11:54 AM | #26 | |
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03-11-2016, 01:00 PM | #27 | |
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03-11-2016, 01:24 PM | #28 |
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Well if we are hearing the same thing it looks like you are in CA vs Cleveland for me so maybe the cold weather has to do with the warm up time needed for mine to occur. I'm bringing mine in soon to swap out my winter wheel setup so I will ask them to look into it. Post back if you figure anything out. It's driving me crazy.
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03-18-2016, 02:43 PM | #31 |
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Question for you guys.... My advisor was gracious enough to let me have a 340i loaner while my vehicle is in the service department. Same packaged vehicle with mine, difference is metallic paint. Infact the VIN range between the loaner and my car is about 300 units apart. Both built in South Africa.
Some observations...1st initial impression, the squeak I hear at idle; does not do it on the loaner. Under medium acceleration, I can hear the similar ticks but it is MUCH quieter by a LONG shot. Here is what I find different........I could actually hear the turbo spool and blow off valve on this loaner compared to my car? My car sounds like a N/A vehicle. I'm highly sensitive to noises...and this irks me the differences between these 2 cars. |
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03-18-2016, 02:50 PM | #32 | |
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My diff is scheduled to be swapped on Monday, I'll see if they made any progress on diagnosing the source of the squeak. |
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03-18-2016, 02:55 PM | #33 |
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It's a possibility. I'm also a service advisor for another vehicle manufacturer, and sometimes it can be within tolerances where nothing can be done on our side. Unless it becomes a safety concern or the part will fail causing problems.
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04-04-2016, 09:14 AM | #34 |
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I have a Munich build (week 9) that is currently being held at the port for some "open campaign". Does anyone have any info on that?
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04-04-2016, 09:35 AM | #35 |
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Any update on this? Just read through all of this and it's blowing my mind that the wrong differential could have been installed on your car. How does that kind of mistake even happen!?
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06-16-2016, 08:23 AM | #36 |
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06-16-2016, 08:33 AM | #37 |
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After having the car in to the dealer a few times for the noise, I actually gave our BMW Regional Engineer a ride. Before we even got in, he knew exactly what I was talking about. Apparently it's wastegate related. He said he's had several complaints where people are hearing it bounce off of jersey barriers, or parked cars - all from the passenger side. It only seems to happen under light throttle/boost, where the wastegate is fluctuating/regulating. Under WOT and very light throttle, it's barely noticeable. He said it's just a function of the motor and how it sounds; nothing abnormal or cause for worry. Not sure if there is a case to BMW created for it, but he was very aware of people complaining about it. I have found since then, that the noise is intermittently louder or quieter. Luckily, it's currently been a bit quieter, just about to roll over 4k on the odometer. |
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06-16-2016, 08:44 AM | #38 |
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I hear it isn't have this chirp on my 340 maybe it's an internal issue? Has anyone put a puma case for it?
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02-24-2017, 10:05 AM | #39 | |
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Now that temps are getting warmer, I'm driving with my windows down more often. Ugh, I forgot about this noise during the winter months. Curious if anyone else has had this chirping under load, and/or received any different answers from their dealer. Maybe I just need a Dinan axleback and midpipe to drown it out... |
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04-21-2017, 12:29 PM | #40 |
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OP was there an update for this issue?
I took my 340i in for the same reason and after about 4 weeks and a visit from some head mechanic for BMW, my turbo was replaced. However, the issue is still there. I will be taking it in again, but I wanted to know if you received any resolution. |
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04-21-2017, 12:32 PM | #41 | |
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No resolution to speak of. I'm curious why our regional engineer passed it off as normal wastegate/vacuum noise, and you received a new turbo. Do you have a copy of the service invoice or the name of your 'head mechanic'? You can PM me if you want... |
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01-28-2018, 08:00 AM | #42 | |
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02-04-2019, 09:26 PM | #43 |
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Same Here
Hey guys new to the forum. I couldn’t help but to chime in. I recently bought a 2016 340i 6mt. I have taken it to two dealers regarding the same noise as your video. My car does the exact same thing. The sound only lasts during the cold start the goes away in about 20-30 seconds. I do not hear the noise after that time even while driving with the windows down. I thought for sure idler pulley or belt or both. The first dealership said it was normal and the second replaced the serpentine belt and pulley but the noise is still there. On further investigation on my part, I removed the stock air box as the noise seems to be more prevalent at the passenger side of the motor. I too thought maybe wastewater related, flappped open during cold start or secondary air pumps like older models were equipped with. I am still puzzled as I am currently around 43k miles. Other than the first 20-30sec start up the car runs and drives great. It could also be that my OCD has gotten the best of me. It’s quick and coming from a mk6 golf r. If there is any other light to be shed on what this could possibly be I would love any further input. Thank you guys and happy motoring.
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