Noise coming from the rear at 90MPH+

andrew3series · 08-09-2020, 09:16 AM

Hey friends, I'm having a problem with my '17 340i xdrive.

I hear a noise from the rear of my car when my foot is on the gas when approaching speeds 90mph+
It is loudest at the 89-91mph range.

I have recently replaced my front differential at the dealer for a noise coming from the front and now i'm back with this shit...

I have included a video of the sound. Any idea what it is?

View post on imgur.com

F32Fleet · 08-09-2020, 10:29 AM

Rear differential?

cfm56d7b · 08-09-2020, 12:13 PM

The most difficult challenge is for the dealer (or mechanic) to consistently duplicate this problem while driving 90+ mph.

Do you have a code reader? I suggested to scan for any stored codes as the first step.

Solidjake · 08-09-2020, 12:36 PM

Quote:

Originally Posted by cfm56d7b

Do you have a code reader? I suggested to scan for any stored codes as the first step.

It's a mechanical fault not an electric one that will give a code.

OP I have the same thing coming from my 328 in the rear (RWD) from 60-70mph.

cfm56d7b · 08-09-2020, 02:33 PM

Scanning for codes is always a good idea. Even if the fault is mechanical, there are many sensors across the drivetrain which look for conditions outside of operating envelope.

QZS58 · 09-08-2020, 06:37 PM

Had a same noise at 45-55 mph with my 16' 435i gc. Dealer replaced rear differential last year but the noise came back after 4 months, so they had to replace it again. Car is under warranty so there's no charge luckily. On my last visit to the deal for 30k miles server, they found a oil leak in the rear axle.. Car is bone stock and I don't drive aggressively at all. It's not a huge problem but gets really annoying.

08-09-2020, 09:16 AM	#1
andrew3series Enlisted Member 3 Rep 34 Posts Drives: BMW 340i xDrive Join Date: May 2020 Location: NYC iTrader: (0)	Noise coming from the rear at 90MPH+ Hey friends, I'm having a problem with my '17 340i xdrive. I hear a noise from the rear of my car when my foot is on the gas when approaching speeds 90mph+ It is loudest at the 89-91mph range. I have recently replaced my front differential at the dealer for a noise coming from the front and now i'm back with this shit... I have included a video of the sound. Any idea what it is? View post on imgur.com
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08-09-2020, 10:29 AM	#2
F32Fleet Lieutenant General 3566 Rep 10,344 Posts Drives: 2015 435i Join Date: May 2005 Location: Southeastern US iTrader: (0)	Rear differential? __________________ "Drive more, worry less. " 435i, MPPK, MPE, M-Sport Line
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08-09-2020, 12:13 PM	#3
cfm56d7b Lieutenant General 5876 Rep 10,247 Posts Drives: 2017 440i Gran Coupe & 2015 X5 Join Date: Nov 2012 Location: Orange County, CA iTrader: (2)	The most difficult challenge is for the dealer (or mechanic) to consistently duplicate this problem while driving 90+ mph. Do you have a code reader? I suggested to scan for any stored codes as the first step.
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08-09-2020, 02:33 PM	#5
cfm56d7b Lieutenant General 5876 Rep 10,247 Posts Drives: 2017 440i Gran Coupe & 2015 X5 Join Date: Nov 2012 Location: Orange County, CA iTrader: (2)	Scanning for codes is always a good idea. Even if the fault is mechanical, there are many sensors across the drivetrain which look for conditions outside of operating envelope.
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09-08-2020, 06:37 PM	#6
QZS58 New Member 9 Rep 13 Posts Drives: BMW G80 M3 Join Date: Jun 2020 Location: Atlanta iTrader: (0)	Had a same noise at 45-55 mph with my 16' 435i gc. Dealer replaced rear differential last year but the noise came back after 4 months, so they had to replace it again. Car is under warranty so there's no charge luckily. On my last visit to the deal for 30k miles server, they found a oil leak in the rear axle.. Car is bone stock and I don't drive aggressively at all. It's not a huge problem but gets really annoying.
	Appreciate 0 Quote

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