Rattling at Idle

eDubz · 08-29-2021, 09:25 PM

Hey Guys - my wife has a 2013 X3 35i Msport with 125k miles. There's a weird issue where there is a loud sounding rattle when I'm in Drive, stopped with the brakes applied. When I start to accelerate or put it in park, the sound goes away. Any ideas?

pungo · 08-29-2021, 10:24 PM

Use mechanics stethoscope to isolate the location of the rattle.

383vett · 09-05-2021, 06:42 PM

Quote:

Originally Posted by eDubz

Hey Guys - my wife has a 2013 X3 35i Msport with 125k miles. There's a weird issue where there is a loud sounding rattle when I'm in Drive, stopped with the brakes applied. When I start to accelerate or put it in park, the sound goes away. Any ideas?

Could be a tensioner and pulley issue. It’s a common problem.

BMWfan73 · 09-11-2021, 09:44 AM

Does it sound like it's coming from the passenger side of the car? I just started hearing this in my '15 35i. When I turn the a/c off it stops and returns when I turn it on again.

eDubz · 09-11-2021, 09:48 AM

Quote:

Originally Posted by BMWfan73

Does it sound like it's coming from the passenger side of the car? I just started hearing this in my '15 35i. When I turn the a/c off it stops and returns when I turn it on again.

Hard to tell which side it's coming from but I feel like it's related to the AC as well. I'll try turning the AC off and see if that makes a difference.

It's just so weird that the sound goes away if I put it in Park or start to accelerate. It's only when I'm stopped, in Drive, with my foot on the brake. The car sounds like a ghetto beater…lol

eDubz · 09-11-2021, 09:16 PM

Yup, it stops when I turn off the AC and starts again when I turn it back on.

dziku2 · 09-13-2021, 01:23 PM

Maybe the air conditioning compressor bearing has worn out.

08-29-2021, 09:25 PM	#1
eDubz Private First Class 47 Rep 138 Posts Drives: 2012 X5M Join Date: Aug 2018 Location: USA iTrader: (0)	Rattling at Idle Hey Guys - my wife has a 2013 X3 35i Msport with 125k miles. There's a weird issue where there is a loud sounding rattle when I'm in Drive, stopped with the brakes applied. When I start to accelerate or put it in park, the sound goes away. Any ideas? __________________ 2012 X5M /// Velos Stage 2 /// xHP Stage 3 TCU tune /// Sprint Booster 2013 X3 35i M-Sport
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08-29-2021, 10:24 PM	#2
pungo Colonel 880 Rep 2,547 Posts Drives: Z4MC-X3-35i-525i, Corrado G60 Join Date: Nov 2007 Location: MD iTrader: (5) Garage List 2011 BMW X3 x35i [0.00] 2001 BMW 525i [0.00] 2007 BMW Z4 M Coupe [8.76]	Use mechanics stethoscope to isolate the location of the rattle.
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09-11-2021, 09:44 AM	#4
BMWfan73 Lord of Glencoe 34 Rep 108 Posts Drives: '15 xDrive35i M-Sport Join Date: Aug 2020 Location: Big Sky Country, MT iTrader: (0)	Does it sound like it's coming from the passenger side of the car? I just started hearing this in my '15 35i. When I turn the a/c off it stops and returns when I turn it on again. __________________ (OO)=[][]=(OO)
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09-11-2021, 09:16 PM	#6
eDubz Private First Class 47 Rep 138 Posts Drives: 2012 X5M Join Date: Aug 2018 Location: USA iTrader: (0)	Yup, it stops when I turn off the AC and starts again when I turn it back on. __________________ 2012 X5M /// Velos Stage 2 /// xHP Stage 3 TCU tune /// Sprint Booster 2013 X3 35i M-Sport
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09-13-2021, 01:23 PM	#7
dziku2 Registered 2 Rep 4 Posts Drives: BMW X3 F25 Join Date: Sep 2021 Location: Poland iTrader: (0)	Maybe the air conditioning compressor bearing has worn out.
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