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E46 M3 (2001-2006) Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006.


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Old Sat, Sep-23-2017, 02:21:32 AM   #1
LemonOne
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Default These lights came on today PLEASE HELP! (Yellow DSC + BRAKE lights)

Hello members,

E46 M3 newbie here, today I was driving and got these lights lit up for the second time (after about couple months) and now I'm really starting to get nervous.

IMG_1032.jpg

Any ideas?

Last edited by LemonOne; Sat, Sep-23-2017 at 03:27:11 AM.
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Old Sat, Sep-23-2017, 02:57:50 AM   #2
lmtfi
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Default Re: These lights came on today PLEASE HELP!

What does your manual say when you look it up?
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Old Sat, Sep-23-2017, 03:24:30 AM   #3
whips333
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Default Re: These lights came on today PLEASE HELP!

Could be steering angle sensor or wheel speed sensor
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Old Sat, Sep-23-2017, 03:26:08 AM   #4
LemonOne
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Default Re: These lights came on today PLEASE HELP!

Things I checked:

- brake fluid is near 'MAXIMUM' level
- brake pad is about 1/3 left
- hard braking works fine

Here's what the manual says:

IMG_1033.jpg

IMG_1034.jpg

What do you think?
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Old Sat, Sep-23-2017, 03:28:45 AM   #5
ColinGreene
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Default Re: These lights came on today PLEASE HELP!

Looks like a parts car to me. Send it my way. I know what to do with those.
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Old Sat, Sep-23-2017, 04:04:17 AM   #6
sypher529
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Default Re: These lights came on today PLEASE HELP! (Yellow DSC + BRAKE lights)

It can be the DSC, overtime the soldering points on the back of the card get weak and don't make full contact anymore some shops can resolder those points and that is the cheapest solution. Buying a new one is about $1,600. You can take your chance with another DSC unit off of a junked car. The shop around me said there is a place you can take yours off and send it to and get it fixed for about $300 if you want the info let me know I'll call the shop in the morning and get the location and info of the DSC repair location. If I remember right it's called DSC Masters

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Old Sat, Sep-23-2017, 12:23:21 PM   #7
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Default Re: These lights came on today PLEASE HELP!

Probably a wheel rotation sensor. These are the most common thing to go bad.
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Old Sat, Sep-23-2017, 01:26:22 PM   #8
TropicalM3
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Default Re: These lights came on today PLEASE HELP!

Get a code reader and see what code it is throwing. On my M3, when those lights come on it is the pressure sensor on the master cylinder that is the culprit. It could many diff reasons y, read the codes.
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Old Sat, Sep-23-2017, 03:01:14 PM   #9
LemonOne
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Default Re: These lights came on today PLEASE HELP!

I need to get the scan tool soon.
Weird thing is, it went away when I washed my car (jet-sprayed the wheels) for about an hour and came back on again.
As someone mentioned I assume it's coming from the wheels area (maybe sensors going bad? connection issue?)
Unfortunately, the owner's manual doesn't help much in this case.
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Old Sat, Sep-23-2017, 03:07:50 PM   #10
ABinAZ
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Default Re: These lights came on today PLEASE HELP!

I didn't have those exact lights - mine was the DSC, red brake light, and abs. My problem was intermittent depending on the heat. I ended up getting a used DSC controller on eBay for $70. It took about 10 minutes to swap out and I haven't had any problems ever since A lot of people think it's a wheel speed sensor problem but from my research it's more common to be a DSC module issue.
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Discussing M3 SMG pump reconditioning in the E46 M3 (2001-2006) Forum - Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006. at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)