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Suspension & Braking Forum by BimmerWorld
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Old 06-02-2015, 11:11 PM   #1
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Shaking when brake applied.

Ok. So I figured my front rotors needed to be turned. They are fine. When I apply the brake the steering she'll shakes but the brake pedal is smooth. (No bouncing). Could this be front control arm bushings? Any idea? Oh 2006 330ci zhp vert (auto) wheels are balanced and alignment is good.

Last edited by 2006bmw330cizhp; 06-02-2015 at 11:15 PM.
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Old 06-03-2015, 12:07 AM   #2
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How do you know the rotors are good?
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Old 06-03-2015, 12:23 AM   #3
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Had them checked. And it makes sense that they are not the the problem because the pedal is smooth no matter if I press lightly or hard. Only the steering wheel shakes and feels like the front wheels shake when braking
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Old 06-03-2015, 07:23 PM   #4
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It could be the bushings. I used to have this happen when braking in downhill turns. It made a loud rattle noise and I could feel the steering wheel shaking.
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Old 06-04-2015, 08:42 PM   #5
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It could be a bad spot / uneven wear on the pads. And I would bet it's a brakes/rotors problem, not bushings. That said, you can try to check for bad bushings simply by raising the car and checking the wheels for play(grab top (12) and bottom (6) of tire with it in the air and wiggle it as if you were trying to take off a wheel frozen to a hub). Then do the same thing grabbing the tire at 3 o'clock and 9 o'clock. If you can't "feel" it, get someone else to do what I suggested while you look at the bushings and control arms for play. If knew where you were located and if you were close by I could likely recommend someone to check it free, and/or repair. But I do hope that helps...ed in NJ
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Old 06-05-2015, 09:05 AM   #6
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i still say rotors. didn't think these rotors could be turned either?
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Old 06-05-2015, 10:13 AM   #7
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I have the same issue at 115k and believe its the rotors but wont know till' i replace them along with the pads this summer. Is your DSC ABS BRAKE on by any chance?
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Old 06-24-2015, 02:33 PM   #8
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When that started to occur on mine, it was the front control arm bushings. I know it sounds weird, but I replaced them and the shuddering stopped.
You are only paranoid until you are correct....then you are a visionary
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