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Suspension & Braking Forum by BimmerWorld
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Old 01-24-2016, 05:15 PM   #1
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E46 328i uneven braking

I have a uneven braking problem. By uneven I mean that when i have the same pressure on the brake the car will brake harder/lighter every rotation if that makes sense. I checked the rotors and there smooth and seem to be fine. Any tips would be appreciated.
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Old 01-25-2016, 07:24 AM   #2
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Sounds like the brake booster is having issues. Check the hose from the intake manifold to the booster. That's item #7 in http://www.realoem.com/bmw/enUS/show...diagId=34_0765.
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Old 01-25-2016, 08:16 AM   #3
mr misfire
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Sounds like your rotors are warped. It's very hard to visually diagnose a warped rotor unless there is damage to the rotor like a gouge.

I am assuming your issue is as you slow down you get a womp, womp, womp effect that occurs more slowly as you slow down to a stop.
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Old 01-26-2016, 11:36 AM   #4
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Markus your spot on. I was thinking how to describe it. Womp Womp Womp is definitely it. Could I spot a warp if I pulled the rotor off?
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Old 02-03-2016, 09:36 PM   #5
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Actually Markus ypu were wrong and Mr misfire was spot on lol. Idk
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Old 02-03-2016, 10:38 PM   #6
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Warped rotors usually aren't truly "warped." They are usually brake pad deposits caked on the rotor. When they are resurfaced, it basically removes those deposits. You can try running a harder race track pad and those sometimes will remove the deposits.

How old are your brakes?

2003 330i ZHP 6MT
Performance: Koni Sport Struts/Shocks, Eibach Pro-Kit, 17x9 Apex ARC-8, TMS F&R Sway bars, M3 RTABs w/ Vorshlag Limiters, M3 Strut Brace

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Last edited by bimmernate; 02-03-2016 at 10:40 PM.
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Old 02-05-2016, 03:52 PM   #7
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I'm actually going to get new brake pads and rear wheels when I get my tax money next week. L
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