BMW M3 Forum (E90 E92)

BMW Garage BMW Meets Register Search Today's Posts Mark Forums Read


Go Back   M3Post - BMW M3 Forum > E90/E92 M3 Technical Topics > Suspension | Brakes | Chassis
 
Post Reply
 
Thread Tools Search this Thread
      03-10-2009, 10:26 AM   #1
sayemthree
Brigadier General
 
sayemthree's Avatar
 
Drives: bmw
Join Date: Aug 2007
Location: usa

Posts: 4,844
iTrader: (0)

how is the brake pad service computer reset? (miles to new pads?)

anyone know? also does this car have the pad sensor for minimum pad thickness?
sayemthree is offline  
0
Reply With Quote
      03-10-2009, 10:50 AM   #2
lucid
Major General
 
lucid's Avatar
 
Drives: E30 M3; Expedition
Join Date: Apr 2007
Location: USA

Posts: 8,034
iTrader: (0)

the idrive estimate has nothing to do with the pad wear sensors. the pad wear sensor is a binary indicator. once you wear the pads beyond a threshold, and trip a curcuit, the "brake" light on your dash comes on and won't go away without the use of a proper reset tool. idrive "guesses" at how much pad you've got left, but who knows how. my guess as to how it guesses is the use of deceleration data. the miles left to brake service indicator can be incrementally increased with the use of a proper tool if the pads/rotors don't need replacement, or it can be reset back to 25000 miles if they are replaced. i looked for a tool i could buy that would let me manage this myself, but couldn't find one on the market.
__________________
lucid is offline   United_States
0
Reply With Quote
      03-10-2009, 03:39 PM   #3
sayemthree
Brigadier General
 
sayemthree's Avatar
 
Drives: bmw
Join Date: Aug 2007
Location: usa

Posts: 4,844
iTrader: (0)

thanks. so if I remove the stock pads. put on track pads for the weekend. replace the stock pads on monday it should not screw up the indicator. excpet that it may show less miles on the countdown due to the track use.

so far the coundown seems pretty accurate.
sayemthree is offline  
0
Reply With Quote
      03-10-2009, 08:24 PM   #4
lucid
Major General
 
lucid's Avatar
 
Drives: E30 M3; Expedition
Join Date: Apr 2007
Location: USA

Posts: 8,034
iTrader: (0)

Yes, the miles to brake service will decrease and will be 0 way before your stock pads are worn out. At that point, you'll need to have it increased by using the special tool that only dealers and BMW service shops seem to have.
__________________
lucid is offline   United_States
0
Reply With Quote
      03-10-2009, 11:20 PM   #5
sayemthree
Brigadier General
 
sayemthree's Avatar
 
Drives: bmw
Join Date: Aug 2007
Location: usa

Posts: 4,844
iTrader: (0)

aaagggh! I thought we were past the days of special tools and reset tools that only the stealers have! ;(
sayemthree is offline  
0
Reply With Quote
      03-11-2009, 01:05 AM   #6
JAJ
Captain
 
Drives: 2014 Shelby GT500
Join Date: Apr 2008
Location: Vancouver, BC

Posts: 922
iTrader: (4)

Sad but true - my slightly worn OEM pads, that I took off when I put on my RS19's, only have 7,000 miles left according to the computer. My guess is they'll do at least 40,000 miles, considering they're only on the car when I'm not driving hard.

I'll see what the dealer says when they do my free "low mileage" oil change in April. Maybe they can reset it.
JAJ is offline  
0
Reply With Quote
      03-11-2009, 10:47 PM   #7
sayemthree
Brigadier General
 
sayemthree's Avatar
 
Drives: bmw
Join Date: Aug 2007
Location: usa

Posts: 4,844
iTrader: (0)

so no one knows how the mileage countdown works? maybe an accelerometer used for DSC? it seems fairly accurate so far. and track work took it down quite a bit.
sayemthree is offline  
0
Reply With Quote
Post Reply

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -5. The time now is 04:42 PM.




m3post
Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST