really need help with vibration under car URGENT!

gasaro · 07-13-2023, 08:36 AM

Hello thank you for taking your time to read this.

I recently bought a 540i xdrive g31 2017. When i drive the car at 120-140 i can feel a vibration under the car, behind me. No steering wheel vibration. They took out the driveshaft rebalanced it and put it back in the car. No difference. I also changed all the brake discs, brakepads and tires on wheels that are perfectly straight no bend. What could be the problem?

AP · 07-13-2023, 09:24 AM

I know you said the tyres were replaced. Assume a wheel balance weight is not missing?

Don’t know otherwise

gasaro · 07-13-2023, 09:38 AM

Tires are of course balanced

Tpriest7893 · 07-13-2023, 12:26 PM

Tie rods? Last time my car had a slight vibration one of my tie rods was bad and actually when they did an alignment it showed on the report and my car would never align correctly.

buddyboy · 07-14-2023, 04:25 AM

Did they replace the driveshaft flex discs and or the center bearing support when they had the driveshaft out? Could be a bent control arm too

gasaro · 07-14-2023, 08:40 AM

Thank you everyone so far for the help. I will try to replace the parts

07-13-2023, 08:36 AM	#1
gasaro New Member 3 Rep 18 Posts Drives: 540ix g30 Join Date: Jul 2023 Location: Eu iTrader: (0)	really need help with vibration under car URGENT! Hello thank you for taking your time to read this. I recently bought a 540i xdrive g31 2017. When i drive the car at 120-140 i can feel a vibration under the car, behind me. No steering wheel vibration. They took out the driveshaft rebalanced it and put it back in the car. No difference. I also changed all the brake discs, brakepads and tires on wheels that are perfectly straight no bend. What could be the problem?
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07-13-2023, 09:24 AM	#2
AP Major General 2762 Rep 5,082 Posts Drives: G30 M550 Join Date: Apr 2011 Location: UK iTrader: (0)	I know you said the tyres were replaced. Assume a wheel balance weight is not missing? Don’t know otherwise
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07-13-2023, 09:38 AM	#3
gasaro New Member 3 Rep 18 Posts Drives: 540ix g30 Join Date: Jul 2023 Location: Eu iTrader: (0)	Tires are of course balanced
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07-13-2023, 12:26 PM	#4
Tpriest7893 Captain 212 Rep 816 Posts Drives: Bmw 335i f30 N55 ( sold) Join Date: Nov 2017 Location: Venice Florida iTrader: (0) Garage List [0.00] 2012 bmw 335 [0.00] 02 2002 m3 Vert [0.00]	Tie rods? Last time my car had a slight vibration one of my tie rods was bad and actually when they did an alignment it showed on the report and my car would never align correctly. __________________ 2012 bmw 335i sedan VRSF catless DP VRSF 5? HD IC Stock intake(had open before and was sick of noise) BMS CP 550i 351m rims with 275/245 set up. No tune as of yet.
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07-14-2023, 04:25 AM	#5
buddyboy First Lieutenant 265 Rep 331 Posts Drives: 17 540ix Join Date: Oct 2018 Location: Ireland iTrader: (0)	Did they replace the driveshaft flex discs and or the center bearing support when they had the driveshaft out? Could be a bent control arm too __________________ Pure800, Dorch DS2, VRSF sports cat, MST intake, MHD ECA, XHP, Pureboost.de custom tuned
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07-14-2023, 08:40 AM	#6
gasaro New Member 3 Rep 18 Posts Drives: 540ix g30 Join Date: Jul 2023 Location: Eu iTrader: (0)	Thank you everyone so far for the help. I will try to replace the parts
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