Steering Shaking With And Without Hot Brakes - BMW Forum - BimmerWerkz.com
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#1 (permalink) Old 10-25-2004, 05:10 PM
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Ive had this 1999 e-46 for about 5 years now, and its been a great car, except a major issue that has slowly become much worse in the last few months. on th freeway, going 60-75mph,the car will start by having a faint growling noise, low frequency vibration. then, it gets worse and worse until the wheel starts to shake back and forth violently, add some brakes, and it gets reallly violent. stick your head out and you can see the front wheel going side to side with the steering wheel! pull over, and the car surges all the way to stop. check brake rotor temps, even if they have not been used for 20 miles, ..... smokin hot, while rears are cold. brakes when you first get in the car, are perfect. sometimes, i can stop the sticking calipers (as what it seems like) by engaging ABS a few times at 80mph. as long as i dont use the brakes , there could be no vibration for 20 miles again. thought it was a bad ball joint on the passenger side, but when i changed the lower control arm, nothing changed.. steering system feels tight when you jack the car up. only movement is in the rear lower control arm " dounut" bushings.
Help!!!!! ive had this issue , that was more intermittant over the last few years, now, its every day. new rotors and pads seemed to make this issue worse.. not, im wondering if the vibration is really due to warped rotors after the ABS, calipers or whatever is causing the brakes to engage , only in front and make them hot.

there is a warning light on the right side of the dash, and it looks like brakes or something. (ive heard it could be the ABS issue warning)

any ideas?????? could the ABS system slowly apply front brakes without pedal activation. why would the issue show itself in a very nasty vibration?

any help would be appreciated

Mk
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#2 (permalink) Old 10-26-2004, 12:13 AM
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In my '99 E46, the ABS module was replaced after it had failed. My wheels shutter too now... though not violently. At first, I replaced the front pads, they had 0.5mm left on them... so that explained the odd shifting pattern of the car when I applied the brakes. I also replaced the rotors at the same time. I'm saving up to replace my calipers as well... as the pad was so low, it made the piston cover get stuck... Eh, money money money.....

There was a Bullitin sent out to all BMW centers, I found this on E46Fanatics.com:
Quote:
Q: When I brake at high speeds, my steering wheel vibrates.
A: Many people have reported this problem for MY2000 cars and earlier. It seems to develop after a few thousand miles. There was a TSB released which I believe replaced front control arms and rotors. There were mixed reviews on whether this fix resolved the problem. There hasn't been many reports of this problem on MY2001 cars so it appears to be fixed.
I know I'm not really answering your question very well, however, there does seem to be a problem with the front stering of our cars.

Dough

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#3 (permalink) Old 10-26-2004, 02:41 AM
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Quote:
Originally posted by doughboyea@Oct 25 2004, 10:13 PM
In my '99 E46, the ABS module was replaced after it had failed. My wheels shutter too now... though not violently. At first, I replaced the front pads, they had 0.5mm left on them... so that explained the odd shifting pattern of the car when I applied the brakes. I also replaced the rotors at the same time. I'm saving up to replace my calipers as well... as the pad was so low, it made the piston cover get stuck... Eh, money money money.....

There was a Bullitin sent out to all BMW centers, I found this on E46Fanatics.com:
Quote:
Q: When I brake at high speeds, my steering wheel vibrates.
A: Many people have reported this problem for MY2000 cars and earlier. It seems to develop after a few thousand miles. There was a TSB released which I believe replaced front control arms and rotors. There were mixed reviews on whether this fix resolved the problem. There hasn't been many reports of this problem on MY2001 cars so it appears to be fixed.
I know I'm not really answering your question very well, however, there does seem to be a problem with the front stering of our cars.

Dough
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Its either warped rotors or I think control arm bushings can cause a shake as well.

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#4 (permalink) Old 10-26-2004, 12:02 PM
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the problem with the warped rotor is why does it happen when brakes are not even used? and if the problem happens. (violent shutter) , i pull over and the rotors are 300 degrees? sure, the problem could be amplified by the rotors getting hot and then warping, however, when the problem is not happening, its smooth as silk, and i can drag the brakes to get them hot and no vibration. later, the vibration starts slowely, and pretty soon, its violent. sometimes engagine the ABS can relieve the issue. today for example , its been perfect and ive braked and driven 80mph for 20 miles and no issues. but on the way home....... we will see.

Mk

Quote:
Originally posted by ///M3 FX+Oct 26 2004, 12:41 AM--><div class='quotetop'>QUOTE(///M3 FX @ Oct 26 2004, 12:41 AM)</div><div class='quotemain'><!--QuoteBegin-doughboyea@Oct 25 2004, 10:13 PM
In my '99 E46, the ABS module was replaced after it had failed.* My wheels shutter too now... though not violently.* At first, I replaced the front pads, they had 0.5mm left on them... so that explained the odd shifting pattern of the car when I applied the brakes.* I also replaced the rotors at the same time.* I'm saving up to replace my calipers as well... as the pad was so low, it made the piston cover get stuck... Eh, money money money.....

There was a Bullitin sent out to all BMW centers, I found this on E46Fanatics.com:
Quote:
Q: When I brake at high speeds, my steering wheel vibrates.
A: Many people have reported this problem for MY2000 cars and earlier. It seems to develop after a few thousand miles. There was a TSB released which I believe replaced front control arms and rotors. There were mixed reviews on whether this fix resolved the problem. There hasn't been many reports of this problem on MY2001 cars so it appears to be fixed.
I know I'm not really answering your question very well, however, there does seem to be a problem with the front stering of our cars.

Dough
[snapback]218612[/snapback]

Its either warped rotors or I think control arm bushings can cause a shake as well.
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