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Old 01-09-2013, 07:49 PM
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Yorgi Yorgi is offline
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Location: Toronto
 
Join Date: Mar 2005
Posts: 3,462
Mein Auto: '04 M3 / '06 650i Cab
My guesses:
  • problem with the "brake dry" feature which is controlled by the ABS unit
  • brake caliper piston problem
  • bad bearing or other bent suspension parts
  • problem with the guide pins - dirty, swollen rubber guide bushing
  • other problem with the caliper - cleanliness, corrosion etc...

Are you using all OEM parts (pads and rotors)? Have you tried reading codes for anything related to ABS?

If you have a problem with one of the DSC/ABC control systems it will difficult to diagnose. I think the first thing I would do is grab an infrared temperature gun and check the rotor temps after a drive on the highway to confirm they are overheating while driving on the highway and not somewhere else (like in the city).

If you confirm the overheating is happening on the highway I would first try pulling fuses on the ABS/DSC systems and re-test. If this fixes overheating start testing/replacing units.

If the brakes are still overheating I would completely disassemble and clean/lube the entire front calipers and have the bearings checked. Also check for bent suspension parts. Is your front tire wear even?

If cleaning does not work I would replace the calipers with rebuilt units, they are not that expensive - about $50 each.
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'04 M3 - track
'06 650i Cab - daily driver
'02 Highlander - kid hauler
'01 330Ci - winter beater


Last edited by Yorgi; 01-09-2013 at 08:35 PM. Reason: typo
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