Drivetrain pop on 340xi?

GA/\/\/\/\A_CT · 02-20-2019, 06:46 PM

My 340xi 6spd seems to have a drivetrain problem. In recent cold weather, upon cold start, when I back up and turn there’s and audible “pop” and it’s forceful to the point that the car actually seems to rock side to side.

Does this sound like its the AWD system buckling? (My guess). Anyhow, Im going to bring the car to dealer under warranty but wanted to be prepared with some forum knowledge on possible causes and remedies.

Thanks, you guys are the best!

harperium · 02-20-2019, 09:07 PM

maybe have a friend take a video of it?

is it always in conjunction with turning?

GA/\/\/\/\A_CT · 02-21-2019, 09:19 AM

Quote:

Originally Posted by harperium

maybe have a friend take a video of it?

is it always in conjunction with turning?

Yes, it’s just when turning.

cfm56d7b · 02-21-2019, 09:35 AM

Does the problem occur consistently or only when the weather is cold? The dealer may be reluctant to investigate unless the problem can be replicated.

I also suggest to have a friend record the video.

GA/\/\/\/\A_CT · 02-21-2019, 10:37 AM

It’s been happening over the past month, which coincides with cold weather. Good suggestion from you both to video record. I will do and follow up on this thread.

msk340i · 02-22-2019, 01:02 PM

If it's on full lock it should be normal as per BMW service advisor in Orlando. I had the same issue and they said it's normal, more noticable in colder weather.

BMW in NE · 02-22-2019, 02:11 PM

I had the same issue on my 15' 335. Brought it to the dealer and they found my thrust arm bushing was blown out. They replaced it and I didn't have any issues after that.

GA/\/\/\/\A_CT · 02-22-2019, 03:12 PM

Quote:

Originally Posted by msk340i

If it's on full lock it should be normal as per BMW service advisor in Orlando. I had the same issue and they said it's normal, more noticable in colder weather.

Thank. It’s not even full lock when mine is doing that.

But honestly, if it didn’t do it new then I wouldn’t accept the service advisor claims that it was normal.

GA/\/\/\/\A_CT · 02-22-2019, 03:13 PM

Quote:

Originally Posted by BMW in NE

I had the same issue on my 15' 335. Brought it to the dealer and they found my thrust arm bushing was blown out. They replaced it and I didn't have any issues after that.

Thanks, good info.

kern417 · 02-23-2019, 07:49 AM

It only does it once and then it goes away?

GA/\/\/\/\A_CT · 02-23-2019, 10:06 AM

Quote:

Originally Posted by kern417

It only does it once and then it goes away?

Not sure, will have to test.

02-20-2019, 06:46 PM	#1
GA/\/\/\/\A_CT Lieutenant 220 Rep 589 Posts Drives: ‘20 m340ix Join Date: Jan 2018 Location: CT iTrader: (0)	Drivetrain pop on 340xi? My 340xi 6spd seems to have a drivetrain problem. In recent cold weather, upon cold start, when I back up and turn there’s and audible “pop” and it’s forceful to the point that the car actually seems to rock side to side. Does this sound like its the AWD system buckling? (My guess). Anyhow, Im going to bring the car to dealer under warranty but wanted to be prepared with some forum knowledge on possible causes and remedies. Thanks, you guys are the best!
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02-20-2019, 09:07 PM	#2
harperium Major 1313 Rep 1,064 Posts Drives: G80 M3cx Join Date: Dec 2016 Location: Chicago iTrader: (0)	maybe have a friend take a video of it? is it always in conjunction with turning?
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02-21-2019, 09:35 AM	#4
cfm56d7b Lieutenant General 5886 Rep 10,256 Posts Drives: 2017 440i Gran Coupe & 2015 X5 Join Date: Nov 2012 Location: Orange County, CA iTrader: (2)	Does the problem occur consistently or only when the weather is cold? The dealer may be reluctant to investigate unless the problem can be replicated. I also suggest to have a friend record the video.
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02-21-2019, 10:37 AM	#5
GA/\/\/\/\A_CT Lieutenant 220 Rep 589 Posts Drives: ‘20 m340ix Join Date: Jan 2018 Location: CT iTrader: (0)	It’s been happening over the past month, which coincides with cold weather. Good suggestion from you both to video record. I will do and follow up on this thread.
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02-22-2019, 01:02 PM	#6
msk340i Major 1320 Rep 1,134 Posts Drives: 340i M sport Join Date: Jan 2019 Location: Orlando, FL iTrader: (1)	If it's on full lock it should be normal as per BMW service advisor in Orlando. I had the same issue and they said it's normal, more noticable in colder weather.
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02-22-2019, 02:11 PM	#7
BMW in NE Second Lieutenant 69 Rep 287 Posts Drives: 2022 M340 xDrive Join Date: Dec 2013 Location: New England iTrader: (3)	I had the same issue on my 15' 335. Brought it to the dealer and they found my thrust arm bushing was blown out. They replaced it and I didn't have any issues after that.
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