Clunking Sound Right Rear

dskurth · 07-06-2018, 06:31 PM

My BRAND NEW X3 M40i at 500 miles starting making a clunking sound that is in rhythm with the rotation of the tire. It seems to only appear when the car is very warm and after a period of driving at highway speeds, as you slow down to a stop and then firmly press the brake. As you drive off, usually on a up hill grade, you hear this clunk clunk clunk sound.

At first is was only 3 time, but now it is getting long and louder.

Does not matter which mode, sport, comfort or Eco. Does not matter if you turn off the DTS. But there is this stutle feeling of wandering in back ..that is not comfortables, at highway speeds on the lanes that are groved.

Any one else having this problem??. The dealer is stumped so far...but giving it a really good effort. Beginning to think I got a lemon.

Need the bimmer geeks to kick in here....

mjdth · 07-07-2018, 11:49 AM

A lot of us have this. I brought my car in and they said they fixed it and it seemed fine for a day but came back almost immediately.

Seems to only happen sometimes but when it does it's infuriating and does seem more related to simple movement of the car rather than just hitting bumps.

bmtespar · 07-07-2018, 12:16 PM

Some others have reported defective exhaust hangers with a similar sound coming from the rear of the vehicle. I believe a few had had their exhaust system replaced.

mjdth · 07-07-2018, 12:26 PM

Quote:

Originally Posted by bmtespar

Some others have reported defective exhaust hangers with a similar sound coming from the rear of the vehicle. I believe a few had had their exhaust system replaced.

I'm waiting to have that happen but it's on backorder right now. They said it could be a month or two to get it.

dskurth · 07-08-2018, 10:47 AM

Quote:

Originally Posted by mjdth

A lot of us have this. I brought my car in and they said they fixed it and it seemed fine for a day but came back almost immediately.

Seems to only happen sometimes but when it does it's infuriating and does seem more related to simple movement of the car rather than just hitting bumps.

Really. I found the pattern that makes the sound happen and heat it the primary issue. If you press the brake down hard, after driving at highway speeds, it happens almost immediately after starting up from a stop.

But is also started to feel like push and pull from the back end at highway speeds, especially on roads that are grooved. That I can't live with, it feels unsafe. The dealer fixed it by re tightening the suspension, but within a couple days both problems reappeared. That is a safety issue to me. Have you seen similar problems?

arciga18 · 07-09-2018, 08:26 PM

Quote:

Originally Posted by dskurth

Quote:

Originally Posted by mjdth

A lot of us have this. I brought my car in and they said they fixed it and it seemed fine for a day but came back almost immediately.

Seems to only happen sometimes but when it does it's infuriating and does seem more related to simple movement of the car rather than just hitting bumps.

Really. I found the pattern that makes the sound happen and heat it the primary issue. If you press the brake down hard, after driving at highway speeds, it happens almost immediately after starting up from a stop.

But is also started to feel like push and pull from the back end at highway speeds, especially on roads that are grooved. That I can't live with, it feels unsafe. The dealer fixed it by re tightening the suspension, but within a couple days both problems reappeared. That is a safety issue to me. Have you seen similar problems?

I had the exhaust replaced. Wife (her daily) says rattle it still there after pressing on the brakes. I rode in the passenger seat Friday and noticed it a little but it is not bad.

Not sure what else to do

07-06-2018, 06:31 PM	#1
dskurth Private 42 Rep 94 Posts Drives: 2019 BMW X3 M40i Join Date: Apr 2018 Location: Los Angeles iTrader: (0)	Clunking Sound Right Rear My BRAND NEW X3 M40i at 500 miles starting making a clunking sound that is in rhythm with the rotation of the tire. It seems to only appear when the car is very warm and after a period of driving at highway speeds, as you slow down to a stop and then firmly press the brake. As you drive off, usually on a up hill grade, you hear this clunk clunk clunk sound. At first is was only 3 time, but now it is getting long and louder. Does not matter which mode, sport, comfort or Eco. Does not matter if you turn off the DTS. But there is this stutle feeling of wandering in back ..that is not comfortables, at highway speeds on the lanes that are groved. Any one else having this problem??. The dealer is stumped so far...but giving it a really good effort. Beginning to think I got a lemon. Need the bimmer geeks to kick in here.... __________________ Computer Engineer and Equestrian who loves great handling cars.
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07-07-2018, 11:49 AM	#2
mjdth Private First Class 82 Rep 152 Posts Drives: X3 M40i Join Date: Mar 2018 Location: Chicago iTrader: (0) Garage List 2018 X3 M40i [0.00] 2015 435xi (Sold) [0.00] 2007 335i (Sold) [0.00] 2004 325i (Sold) [0.00]	A lot of us have this. I brought my car in and they said they fixed it and it seemed fine for a day but came back almost immediately. Seems to only happen sometimes but when it does it's infuriating and does seem more related to simple movement of the car rather than just hitting bumps.
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07-07-2018, 12:16 PM	#3
bmtespar Major 709 Rep 1,066 Posts Drives: 19 X3 30i, 18 230iX Vert Join Date: Sep 2014 Location: Atlanta Ga iTrader: (0)	Some others have reported defective exhaust hangers with a similar sound coming from the rear of the vehicle. I believe a few had had their exhaust system replaced.
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