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E39 (1997 - 2003)
The BMW 5-Series (E39 chassis) was introduced in the United States as a 1997 model year car and lasted until the 2004 when the E60 chassis was released. The United States saw several variations including the 525i, 528i, 530i and 540i. -- View the E39 Wiki

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  #1  
Old 06-19-2014, 01:20 PM
SSJRICH 540i SSJRICH 540i is offline
00 E39 540i/6 M Sport
Location: Vancouver, BC
 
Join Date: Feb 2010
Posts: 256
Mein Auto: '98 540i
shuddering while braking

So I was coming down from highway speed and I got a really good shudder. The whole car vibrated quite a bit. I released the brake and re applied and just regular braking. It hasn't happened again, but there is obviously something wearing out.

Its definitely not brake warpage. Brakes are brand new and broken in the right way. I am guessing it must be a bushing somewhere. All the front end links are newer, but have some miles on them.

Anybody else have this? I also have a small vibration while driving on the highway. But its very small. Maybe related. I have had the car up in the air a few times and I checked all the bushings, and they seem to be ok.

I think I am going to replace the thrust arm anyways, since I know that is a common wear part. And I believe that it might be the slight vibration I have. But I don't know if that is going to be the culperate for the shuddering.
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  #2  
Old 06-19-2014, 02:27 PM
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helmet75 helmet75 is offline
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sounds like the thrust arm bushings to me.
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  #3  
Old 06-19-2014, 03:30 PM
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bluebee bluebee is offline
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Location: San Jose, California
 
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Mein Auto: 02 BMW 525i M54 auto 130K
I typed /vibration f3 in the bestlinks and this chart came up which may help:
- The main causes front-end clunk while driving (1) & clunking while braking (1) & the generic causes of vehicle vibration while highway driving (0) (1) (2) (3) (4) (5) & while highway braking (1) (2) (3) & why it's not rotor "warp" (1) & severe ABS shuddering while slow speed braking on bumps (1) & how fluid-filled thrust arm bushings crack and tear causing the BMW to vibrate at speed (0) (1) (1) (2) (3) (4) (5) (6) (7) (8) & a comprehensive TireRack vehicle vibration diagnosis chart (1) (jpg) with wheel match mounting hints (1) & how a worn drive shaft, flex disc, center bearing, or "giunti Boschi", aka giubo (it's not spelled guibo although it sounds like it is to some) can cause the vehicle to vibrate (1) (2) (3) (4) & how to repair the rear driveshaft seal by the differential (1) & how to repair the inner constant velocity (CV) half-drive shaft (1).
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Each repair should invariably add to our knowledge base by the process of inexorable incrementalism.
Your job, in return, is to read the suggested threads, where the best people will always add value to those threads, either by pictures or by descriptions, so the next person with the same problem stands on your shoulders.
See also: E39 Bestlinks & How to easily find what you need
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  #4  
Old 06-19-2014, 04:02 PM
SSJRICH 540i SSJRICH 540i is offline
00 E39 540i/6 M Sport
Location: Vancouver, BC
 
Join Date: Feb 2010
Posts: 256
Mein Auto: '98 540i
Thanks Blu, but I have already read most of those links before. Since this is my second round with an E39 I have been very versed in the typical stuff.

Most of those links, link the shuddering to in proper brake in of the pads, and over pad material build up. I have beded in the pads and I believe that it is something far beyond that. Although I never rule things out.

I will keep posted about what I find. Just need some shop time to diagnose
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Old 06-19-2014, 04:07 PM
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Flybot Flybot is offline
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Location: Louisville, Ky
 
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Mein Auto: '98 528
Ten zillion weekly threads on this topic. Turn your rotors or start replacing front suspension, starting with the thrust arms.
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  #6  
Old 06-19-2014, 04:32 PM
SSJRICH 540i SSJRICH 540i is offline
00 E39 540i/6 M Sport
Location: Vancouver, BC
 
Join Date: Feb 2010
Posts: 256
Mein Auto: '98 540i
Ok thanks for the super sarcastic response, but if you bothered to read my post, I have brand new brakes and I have beded them in the proper way. I am not a NOOB to either E39s or cars. And I have just stated that I am going to start with the thrust arm. Just seeing if anybody had a solid solution that I haven't read about or thought of.
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