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E39 (1997 - 2003)
The BMW 5-Series (E39 chassis) was introduced in the United States as a 1997 model year car and lasted until the 2004 when the E60 chassis was released. The United States saw several variations including the 525i, 528i, 530i and 540i. -- View the E39 Wiki

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  #1  
Old 11-26-2013, 09:39 AM
professorman professorman is offline
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Location: Virgina
 
Join Date: Dec 2012
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Mein Auto: 2000 525i
ABS, Brake and Traction Control lights are ON

Hey! I have a 2000 528i with 170k miles. Two weeks ago, when i was leaving my job, the Traction Control, ABS and Brake lights came on the same time. I stopped and checked my brake fluid level, and it was okay. When I started the car again, they went away, so I drove home. Last Saturday, all 3 lights came on again. I pulled over shortly after, shut the car off, and back on, and they went away. They came back on 2 other times for the night. Sometimes randomly.

The ABS module was rebuilt in 2011 by the previous owner.

What should I check?
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  #2  
Old 11-26-2013, 09:49 AM
BioGuy BioGuy is offline
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Sounds like ABS module to me! Does it have a warranty?
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  #3  
Old 11-26-2013, 09:52 AM
professorman professorman is offline
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Mein Auto: 2000 525i
Quote:
Originally Posted by BioGuy View Post
Sounds like ABS module to me! Does it have a warranty?
I just found bluebee's tread, and the Trifecta light tread... It seems like I have A LOT of reading to do. It seems like a lot of testing and diagnosis. I will start learning soon.
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  #4  
Old 11-26-2013, 06:01 PM
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bluebee bluebee is offline
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Location: San Jose, California
 
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Mein Auto: 02 BMW 525i M54 auto 130K
Quote:
Originally Posted by professorman View Post
It seems like a lot of testing and diagnosis. I will start learning soon.
AFAIK, that first thread has had more eyes on it than any other thread on this forum, over 325,000 views. With that much attention, pretty much all the myths have been debunked, so, do read the thread from start to finish.

However, if you're pressed for time, read post 48, which is an almost-correct summary (a couple of corrections were found out after that was summarized).

The good news is that I think only 1 person in the entire thread of something like 725 posts has failed, and he was just trying to hide the trifecta long enough to sell the car, so, I don't count that as a 'real' failure. So the good news is that you will fix this.

See also:
- How to diagnose the BMW amber ABS BRAKE DSC/ASC trifecta or bifecta (1) & what are all known options when your ABS control module is bad (1) & Quick99Si's explanation of why the 10-minute wheel speed sensor diode-action quick test doesn't always work, especially on brand new non-OEM wheel speed sensors (1) (2) & explanations by 540iman as to why the fancy diagnostic tools very often (extremely often, like almost all the time) fail to properly diagnose the trifecta or bifecta (1) (2) (3) (4) (5) (6) & where to get the fancy schmancy diagnostic tools for free once you're aware of these limitations (1) & an ABS BRAKE DSC trifecta brake pressure sensor diagnostic DIY (1) & how to test and replace the steering angle sensor (1)
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Each repair should invariably add to our knowledge base by the process of inexorable incrementalism.
Your job, in return, is to read the suggested threads, where the best people will always add value to those threads, either by pictures or by descriptions, so the next person with the same problem stands on your shoulders.
See also: E39 Bestlinks & How to easily find what you need

Last edited by bluebee; 11-26-2013 at 06:04 PM.
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