Car swaying left to right randomly?

MSully96 · 04-05-2018, 12:53 PM

Hello,

a month ago I had installed catless downpipes and had to unbolt the steering rack during the install. All was well for the last 3 weeks and all of a sudden I have noticed that typically at highway speeds, the car will randomly feel like its shaking or swaying left to right. It happens with or without throttle input or steering wheel input. Also, it doesnt do it all the time just randomly and only lasts a few seconds. Thoughts?

I have never hit a serious bump or curve.

dsjr2006 · 04-05-2018, 06:23 PM

Sounds like something you should take seriously. Have you double checked the steering rack bolts? Is the swaying possibly caused by wind gusts? When your suspension is worn you’ll notice them much more.

Could also be suspension bushings or wheel balance. It’s all process of elimination. Check the last thing you fixed then narrow it down from there. Pay attention to exactly when it happens and what conditions cause it, see if you can repeat it.

dleccord · 04-05-2018, 07:10 PM

does it happen when you brake too? one of our members had that happen after dp install and he drove into the sidewalk.

04-05-2018, 12:53 PM	#1
MSully96 Private First Class 25 Rep 119 Posts Drives: 2013 335is M6 Coupe Join Date: Jul 2017 Location: MD iTrader: (0)	Car swaying left to right randomly? Hello, a month ago I had installed catless downpipes and had to unbolt the steering rack during the install. All was well for the last 3 weeks and all of a sudden I have noticed that typically at highway speeds, the car will randomly feel like its shaking or swaying left to right. It happens with or without throttle input or steering wheel input. Also, it doesnt do it all the time just randomly and only lasts a few seconds. Thoughts? I have never hit a serious bump or curve. __________________ 2013 335is Manual JB4 G5 ISO - MHD E85 BEF - E45 - Fuel-it Stage 1 - BMS DCI - ECS Chargepipe & BOV - VRSF 3" d0wnp1pes - Muffler Delete w/ 3.5in Magnaflow Tips
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04-05-2018, 06:23 PM	#2
dsjr2006 Captain 157 Rep 848 Posts Drives: '01 E39 540iA, '09 E90 M3 Join Date: May 2013 Location: Metro Detroit iTrader: (1) Garage List 2010 BMW 335i [0.00] 2001 BMW 540i [0.00]	Sounds like something you should take seriously. Have you double checked the steering rack bolts? Is the swaying possibly caused by wind gusts? When your suspension is worn you’ll notice them much more. Could also be suspension bushings or wheel balance. It’s all process of elimination. Check the last thing you fixed then narrow it down from there. Pay attention to exactly when it happens and what conditions cause it, see if you can repeat it. __________________ E90 M3 DCT LCI \| E90 LCI N54 M-Sport(retired) \| E90 Technical Docs download: http://j.mp/bmwe90docs *good read, very detailed.
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04-05-2018, 07:10 PM	#3
dleccord Captain 99 Rep 840 Posts Drives: 2011 BMW 335i E90 Join Date: Apr 2016 Location: Nelson, New Zealand iTrader: (0)	does it happen when you brake too? one of our members had that happen after dp install and he drove into the sidewalk.
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