It is very unlikely that the rotors are actually warped. It is likely that they have uneven pad deposits that cause that sensation.
Recomend that you read through this, it is one of the better summaries out there:
StopTech : Balanced Brake Upgrades
Essentially, it is caused by a combination of your pad material, the initial surface finish of the rotor, and the break-in procedure by which the pads were bedded in, or not.
Cross drilled rotors have less ability to handle heat, so if the rotors were overheating, that would be the wrong way to go.
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2007 X3 3.0si, 6 MT, Premium, White
Retired:
2008 535i, 6 MT, M Sport, Premium, Space Grey
2003 X5 3.0 Steptronic, Premium, Titanium Silver
2002 325xi 5 MT, Steel Grey
2004 Z4 3.0 Premium, Sport, SMG, Maldives Blue
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03-17-2011, 02:10 AM
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