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E46 M3 (2001-2006)

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  #1  
Old 02-02-2006, 05:48 PM
jayf jayf is offline
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Rear Brakes DIY Question

My rear brake pads are getting thin after 85,000 miles on my '02 M3 Conv and the idiot light just came on telling me that. Does anyone out there know the exact minimum thickness of the rotor before it should be thrown out? Does anyone know how to reset the brake indicator light on the dash after I replace the pads (and possibly the rotors too)?
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  #2  
Old 02-02-2006, 06:29 PM
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bren bren is offline
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AFAIK, BMW doesn't recommend turning rotors and the light will go out once you replace the sensor that attaches to the pads.
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  #3  
Old 02-03-2006, 07:49 PM
27rotax 27rotax is offline
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Bentley Publishing wrote a nice manual for e46 cars which includes the m3... expensive, but well worth it. Rotors are actually reasonably priced, so they are usually replaced rather than cut. And as with the previous reply, you need to replace the sensor that is attached to the right side pads, and the light will go out. If you replace pads before the light comes on, you can reuse the old sensors. It's not a tough procedure... good luck!
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  #4  
Old 02-03-2006, 08:09 PM
GregW in Oregon GregW in Oregon is offline
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Rotor thickness

Quote:
Originally Posted by jayf
My rear brake pads are getting thin after 85,000 miles on my '02 M3 Conv and the idiot light just came on telling me that. Does anyone out there know the exact minimum thickness of the rotor before it should be thrown out? Does anyone know how to reset the brake indicator light on the dash after I replace the pads (and possibly the rotors too)?
I don't recall the exact number, but it should be stamped on the hat. If you don't have a rotor caliper, measure with a regular caliper with shims each side, then subtravt the thickness of the shims.
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  #5  
Old 02-05-2006, 05:16 AM
jayf jayf is offline
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Reasonably priced rotors? They are about $275 each. I do not consider that reasonable.
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  #6  
Old 02-05-2006, 07:59 AM
GregW in Oregon GregW in Oregon is offline
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Rotor prices

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Originally Posted by jayf
Reasonably priced rotors? They are about $275 each. I do not consider that reasonable.
You're getting ripped. You can get the factory Euro rotors for $209/ ea rear at Turner ($240/ea. front).

http://www.turnermotorsport.com/html...ParamCat=E46M3
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  #7  
Old 02-12-2006, 06:04 AM
jayf jayf is offline
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I did the rear brake job, no hassles. I bought the new sensor, but the sensor wire hides underneath the car. Am I supposed to remove body parts under the car just to get at it? How dumb is that? Can I splice the new wire for the old wire rather than tearing the under carriage of my car up?

When I did my fronts, the wire was easily accessible.
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  #8  
Old 02-12-2006, 08:57 AM
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BahnBaum BahnBaum is offline
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Quote:
Originally Posted by jayf
I did the rear brake job, no hassles. I bought the new sensor, but the sensor wire hides underneath the car. Am I supposed to remove body parts under the car just to get at it? How dumb is that? Can I splice the new wire for the old wire rather than tearing the under carriage of my car up?

When I did my fronts, the wire was easily accessible.
Why replace the sensor? Just use the existing one.

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  #9  
Old 02-13-2006, 06:57 AM
jayf jayf is offline
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I put the existing one back, but the light on the dash stays on. Unless there is some reset procedure? Is there a dash light reset procedure?
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  #10  
Old 02-13-2006, 07:35 AM
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elbert elbert is offline
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Quote:
Originally Posted by GregW in Oregon
You're getting ripped. You can get the factory Euro rotors for $209/ ea rear at Turner ($240/ea. front).
Also consider Powerslots for $142/ea. or Frozen Rotors for $130/ea. at Tirerack
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  #11  
Old 02-17-2006, 12:22 PM
acitydweller acitydweller is offline
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Are either rotors as good as the oem?
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  #12  
Old 02-23-2006, 11:08 AM
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elbert elbert is offline
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Quote:
Originally Posted by acitydweller
Are either rotors as good as the oem?
I had Powerslots on a different car (street use only) and they seemed ok. However I'm a bit leery of using slotted rotors on the track, so I'm going to order the cryo treated rotors for this car in the next couple days. Seeing how much cheaper they are than the OE rotors, I'll be happy as long as they don't fail catastrophically.
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