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Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 5 Series > E39 (1997 - 2003)

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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Old 07-03-2013, 09:15 AM
Helgason Helgason is offline
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Location: Iceland
Join Date: Jul 2013
Posts: 42
Mein Auto: E39 535i Shadowline
ABS + ASC lights turn on after a few minutes

Hello there guys, how are you.

I'm having troubles with the car I just bought.

I bought it knowing that the ABS was not working properly and I hoped it just was only a sensor problem. Both the ABS + ACS were always on.

I went to my local BMW workshop and had the car computer codes read.
They told me there were error codes on left+right front wheels.

They reset the codes, so the lights went off.
When I was driving from the workshop the brakes went on when I was driving, so couldn't move the car properly until the ABS light got on again. When it came on again the car worked fine, except the lights were back on.

So I took out both the sensors(man it took a while to get them out), and replaced them with new ones.

When I started the car, the ABS light was still on, so I shut it on and off a few times and took a test drive. The lights went out for about a minute and came back on.

So after I replaced the ABS sensors, the problem has changed.
When I start the car now, both the lights are out.
However, when I push the brakes on a dry street, the ABS kicks in and my pedal vibrates(like I was breaking on a slippery surface).
The ABS then keeps kicking in the first 1-3 minutes I drive, then the ABS light come back on and the brakes function properly.

I'm just wondering what to do next.
I'm going to have the computer read again and see if it has the same error codes.

Do you have any ideas on how to fix this problem?
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Old 07-03-2013, 10:07 AM
Burning2nd's Avatar
Burning2nd Burning2nd is offline
Under the lift arms
Location: Under the lift arms
Join Date: Aug 2010
Posts: 8,129
Mein Auto: E39 540, E36 328is, E83x3
It's going in to default mode

It shuts it self down when it has voltage problems

You need to get your self a Bentley manual
Do some testing at the sensors
Do some testing at the module

Stop throwing parts at it
Specializing In BMW, Audi, Mercedes Benz ,Volkswagen, Volvo

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Old 07-04-2013, 09:06 AM
Helgason Helgason is offline
Registered User
Location: Iceland
Join Date: Jul 2013
Posts: 42
Mein Auto: E39 535i Shadowline
Thanks for the response.
Just downloaded the manual and man, it's something. Will talk to my mech's about this.
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Old 07-04-2013, 02:35 PM
HTK12 HTK12 is offline
Officially Welcomed to the 'Fest
Location: Finland
Join Date: Aug 2012
Posts: 1,228
Mein Auto: E39 540i
Since you only got asc on a V8 I assume it's <-8/98 model. These older models rarely have abs module issues. This could be just an electric gremlin so first clean battery posts and cables. Make sure battery cables are tight. Check all ground connections in the engine bay. Load test the battery & check the altenator. What brand are the replacement abs sensors?
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