Welcome to Bimmerfest -- The #1 Online Community for BMW related information! Please enjoy the discussion forums below and share your experiences with the 200,000 current, new and past BMW owners. The forums are broken out by car model and into other special interest sections such as BMW European Delivery and a special forum to voice your questions to the many BMW dealers on the site to assist our members!

Please follow the links below to help get you started!

Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > Z Series > E36/7 Z3 (1996-2002)

E36/7 Z3 (1996-2002)
E36/7 Z3 Roadster, Z3 coupe, Z3 M Roadster and Z3 M Coupe talk with our gurus here.

Reply
 
Thread Tools Display Modes
  #1  
Old 03-06-2008, 12:54 PM
morrieschoice's Avatar
morrieschoice morrieschoice is offline
Officially Welcomed to the 'Fest
Location: birmingham,al
 
Join Date: Oct 2006
Posts: 386
Mein Auto: 2001 3.0 Z-3 ROADSTER
Brake Light & DSC light (Z-3 roadster)

The brake light & DSC light came on simultaneously the other day on my 2001 3.0 Z-3 Roadster. The car has 44,400 mi. on it. Brakes work fine & there's no slipping of the tires in the rear end. The DSC light has come on befoe but eventually went off. The front pads were replaced 14k miles back but the car brakes with no problem & does not pull to the right or left when stopping. Any idea why the lights are on?? Can I use a peake tool to turn off the lights? I am open for suggestions.
Reply With Quote
Advertisement
  #2  
Old 03-07-2008, 03:03 PM
khammack khammack is online now
Warning - Thin Air
Location: Denver, Colorado
 
Join Date: Jun 2004
Posts: 688
Mein Auto: 2002 M Roadster/2014 435i
When the light comes on like that it means that something is wrong with the system. If it was just the DSC light it would mean that it works just like when you have DSC turned off. With the brake light on along with the DSC, it could mean other things. My guess would be that one of the wheel sensors isn't working right. I will be trying to track down why my DSC is on this weekend. From what I can tell, check the wheel sensors first, but it can also be the steering angle sensor or the lateral acceleration and rotational rate sensor (which is under the left seat).

Other posts on the board suggest pulling the codes to see where the problem is. I tried to pull the codes with the key on, but the engine off. There were no codes. I'll try again tomorrow with the car running, if still no codes I'll start with the wheel sensors.
Reply With Quote
  #3  
Old 03-08-2008, 11:46 AM
SamN SamN is offline
Registered User
Location: Virginia
 
Join Date: Nov 2007
Posts: 76
Mein Auto: '99 Z3 2.3; '03 R1150RT
Quote:
Originally Posted by khammack View Post
When the light comes on like that it means that something is wrong with the system. If it was just the DSC light it would mean that it works just like when you have DSC turned off. With the brake light on along with the DSC, it could mean other things. My guess would be that one of the wheel sensors isn't working right. I will be trying to track down why my DSC is on this weekend. From what I can tell, check the wheel sensors first, but it can also be the steering angle sensor or the lateral acceleration and rotational rate sensor (which is under the left seat).

Other posts on the board suggest pulling the codes to see where the problem is. I tried to pull the codes with the key on, but the engine off. There were no codes. I'll try again tomorrow with the car running, if still no codes I'll start with the wheel sensors.
Thanks much for the info. I'm having the exact same problem.
Reply With Quote
  #4  
Old 03-08-2008, 01:59 PM
khammack khammack is online now
Warning - Thin Air
Location: Denver, Colorado
 
Join Date: Jun 2004
Posts: 688
Mein Auto: 2002 M Roadster/2014 435i
I just checked and cleaned all of the wheel sensors, but it didn't help. I'm thinking the next step is to replace the steering sensor, but it is $170. The wheel sensors are about $110 each. Does anyone know if there is any way to test these sensors to tell if they are bad or not. Trial and error replacements can get expensive.
Reply With Quote
  #5  
Old 03-10-2008, 07:28 AM
SC Joe SC Joe is offline
Registered User
Location: Mount Pleasant SC
 
Join Date: Nov 2007
Posts: 62
Mein Auto: 2001 Z3 2.5
I hope you come up with an answer; mine does this intermittantly as well. Typically applies the anti locks HARD on the right front wheel for a few seconds, then the lights come on. I'm thinking a wheel sensor on the Rf wheel, but at $100/shot, I hate to just start replacing parts.
__________________
'01 Topaz blue Z3 2.5
Reply With Quote
  #6  
Old 03-10-2008, 07:54 AM
khammack khammack is online now
Warning - Thin Air
Location: Denver, Colorado
 
Join Date: Jun 2004
Posts: 688
Mein Auto: 2002 M Roadster/2014 435i
I tried to test the wheel sensors based on a post I found for another model of BMW, but the post said there were two pins in each sensor and we seem to have three. I did check all four corners anyway and they all tested the same, but not what the post indicated. I'm thinking my wheel sensors are OK since I got the same reading on each. I did find that there are also sensors on the bottom of the break fluid reservoir, but they look OK. No idea how to test them. I think I'm going to need to take mine to the dealer because it seems to be either the steering sensor (and the computer needs to be reset when it is replaced) or the control unit.

Others have indicated that you can pull codes to see what the problem is, but I tried to pull codes with two different code readers and both reported no codes. I just have a solid DSC light.
Reply With Quote
  #7  
Old 03-10-2008, 08:22 AM
SC Joe SC Joe is offline
Registered User
Location: Mount Pleasant SC
 
Join Date: Nov 2007
Posts: 62
Mein Auto: 2001 Z3 2.5
There is a local independent BMW service place that is prettty good; they have confirmed they can work on it. i may take mine to them. At time, the car slamming on the front brake is troublesome
__________________
'01 Topaz blue Z3 2.5
Reply With Quote
  #8  
Old 03-10-2008, 08:50 AM
khammack khammack is online now
Warning - Thin Air
Location: Denver, Colorado
 
Join Date: Jun 2004
Posts: 688
Mein Auto: 2002 M Roadster/2014 435i
I'm not sure what would cause that, but I would take care of it as soon as possible. It sounds like it could be dangerous.
Reply With Quote
  #9  
Old 03-13-2008, 02:36 PM
morrieschoice's Avatar
morrieschoice morrieschoice is offline
Officially Welcomed to the 'Fest
Location: birmingham,al
 
Join Date: Oct 2006
Posts: 386
Mein Auto: 2001 3.0 Z-3 ROADSTER
brake light & DSC light

If you are interested in seeing where the speed sensor is located...then check with Randy Forbes on this site. Or you can check it out on http:/forums.bimmerforums.com/forum...t=speed=sensor. However, this info. is on another forum..."bimmerforums". Randy Forbes who is a member of this forum is apparently a member of the other one also. He posted pics of the speed sensor. Hope this will help you & me both....let me know if it does...looks fairly easy to replace if needed??
Reply With Quote
  #10  
Old 03-20-2008, 02:41 PM
khammack khammack is online now
Warning - Thin Air
Location: Denver, Colorado
 
Join Date: Jun 2004
Posts: 688
Mein Auto: 2002 M Roadster/2014 435i
Well, after not being able to find anything wrong on my own (except the DSC light on) I took it to the dealer. They put it on their fault reader and didn't find anything wrong except for one code - "Vehicle Power Above 18 Volts". They checked the charging system and it was OK. They then recalibrated the Steering Angle Sensor to fix my DSC light on problem.
Reply With Quote
  #11  
Old 03-20-2008, 02:49 PM
cngizbleevng's Avatar
cngizbleevng cngizbleevng is offline
hardtop potentate
Location: Boiling Springs, PA, USA
 
Join Date: Sep 2005
Posts: 475
Mein Auto: 2001 Z3 3.0i Steptronic
I had that same thing happen last year. I cleaned my wheel speed sensors and evened out the tire pressure (one tire had lost a fair amount of air for some reason), and all has been good since.
__________________
Reply With Quote
  #12  
Old 03-20-2008, 03:00 PM
khammack khammack is online now
Warning - Thin Air
Location: Denver, Colorado
 
Join Date: Jun 2004
Posts: 688
Mein Auto: 2002 M Roadster/2014 435i
Been there, done that. I even tried to test the wheel sensors using a write up I found for an E46 (I think). It wasn't good for Z3s, but I did get similar reading on all 4 wheels, so I thought the wheel sensors were most likely OK. I couldn't find any way to check the steering angel sensor or to recalibrate it, so no choice but to go to the dealer.

At least I got to sit in a 1 series. It looked nice. I'll bet they go fast once they get some in they can actually sell (they said this one was demo only and they can't sell any until after the announcement in about a week).
Reply With Quote
  #13  
Old 09-01-2009, 06:43 AM
ufviper ufviper is offline
Registered User
Location: jacksonville, fl
 
Join Date: Sep 2009
Posts: 1
Mein Auto: 2001 BMW Z3 2.5i
2001 BMW Z3 2.5 DSC Brake Light Brakes activating

Front Brakes Activating hard, DSC light blinking, then DSC and Brake light stay on. It happens random. every 30 miles every other day.

Solution:
Rotational Rate Yaw Sensor Under seat is malfunctioning
Part Number 3452 6 754 289

The mechanic informed me he would charge $1000 to replace but i fixed for only $60 and this is how:
1) The part retail's for $600 dollars - Mechanic told me that a used part is no good and that it has to be programmed. HE IS WRONG. That yaw sensor doesn't have to be programmed and you can do it yourself.
2) FIND A USED SENSOR - Go on EBAY - I found the part for $60 , but i was lucky. Other used yaw sensors go for $260-350. Make sure that it is a POWERSELLER for used parts and that it is a working sensor tested before you bid on it.

The sensor is a universal sensor that was placed on alot of BMW models. Just make sure it's the same part number. The listing on ebay said it came off a 3 series when i drive a Z3 but its fine.

3) The sensor is located under the driver seat and carpet. REMEMBER to disconnect battery before removing seat or the airbag light will stay lit.
4) The carpet under the seat is indented and no tools are needed to reach sensor.
5) The sensor has 2 bolts and a electronic connection (EASY TO REPLACE)
Reply With Quote
  #14  
Old 09-01-2009, 03:30 PM
mcelhinny mcelhinny is offline
Registered User
Location: phoenix, AZ
 
Join Date: May 2007
Posts: 25
Mein Auto: 2000 m roadster
can also be weak battery
Reply With Quote
  #15  
Old 09-02-2009, 01:41 AM
siwilson siwilson is offline
Officially Welcomed to the 'Fest
Location: Horley, UK
 
Join Date: Mar 2004
Posts: 111
Mein Auto: M Roadster S54 - E39 3.0
Just watch out with a used sensor. My yaw sensor was causing problems, but only after around an hour of driving. Park up for an hour and good as new again. I now have a new sensor as a permanent fix and kept the old one as a 'spare'. Just watch out someone else didn't have that intermittant problem and sell a semi-faulty unit.
Reply With Quote
  #16  
Old 04-28-2010, 02:27 PM
lilumiah lilumiah is offline
Registered User
Location: Hertfordshire, UK
 
Join Date: Apr 2010
Posts: 7
Mein Auto: BMW 320Ci M Sport
Chaps, My 320ci is also having the same problems. It happened today after i inflated my tyres (32 at back and 29 in front) and i was driving behind a Hay Truck for a while which was spilling Hay everywhere and so i'm wondering if there may be Hay stuck in my Traction system? Is that possible or am i just making up problems here?

Anyhow, If i wanted to clean the sensors, where would i find them? Thanks
Reply With Quote
  #17  
Old 12-07-2012, 08:51 AM
tim2012 tim2012 is offline
Registered User
Location: CHAS, SC
 
Join Date: Dec 2012
Posts: 2
Mein Auto: Z3 CONVERT
my Brake light is on & my DSC (traction) light is on & my airbag light is on. I took it to German Auto repair and they fixed the Check Engine light but could do nothing with the other 3 lights..... whats the deal? theyve been on for a year now and im ready to sell it but hard to sell with the dash lit up like a christmas tree!!
Reply With Quote
  #18  
Old 12-07-2012, 08:53 AM
tim2012 tim2012 is offline
Registered User
Location: CHAS, SC
 
Join Date: Dec 2012
Posts: 2
Mein Auto: Z3 CONVERT
I have a brand new battery, 4 brand new tires, fresh alignment, brand new front brakes and rotors, new water pump, new fan, new belts and a fresh new oil change.... what gives?
Reply With Quote
  #19  
Old 12-07-2012, 10:26 AM
ghpup ghpup is offline
Glfbggy
Location: Idaho
 
Join Date: Nov 2008
Posts: 272
Mein Auto: 07 X3si, 00 528, 00 MZ3
I believe that your DSC and Brake lights indicate a speed sensor has gone out. Mine did this intermittantly for about 4 months then went solid. After doing some searches in this forum and Bimmerforum, I figured it was the speed sensor. I called my local indi to tell them and make sure he had a speed sensor in stock. Took it to them, they validated on their machine (same one as used by the local deal and direct from BMW) and had it turned around in less than an hour.

The airbag light has been known to indicate a bad seat connector for either the passenger or driver side. At least that is what I've seen in this forum. Do a search and see.

If your indi hasn't figured it out, I would take it to a dealer or a different indi that specializes in BMWs. Mine does BMW, Mercedez and Volvo. Nothing more. They have factory diagnostic machines for all makes, not just the after market readers...that don't always have the right BMW codes in them.

Good luck.
__________________
GLFBGGY
'00 MRoadster, '00 528, '07X3si

Last edited by ghpup; 12-07-2012 at 10:37 AM.
Reply With Quote
Reply

Bookmarks


Forum Navigation
Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > Z Series > E36/7 Z3 (1996-2002)
Today's Posts Search
Thread Tools
Display Modes

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 On



Forum Jump


All times are GMT -7. The time now is 07:13 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
© 2001-2011 performanceIX, Inc. All Rights Reserved .: guidelines .:. privacy .:. terms