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///M3 Forum
The BMW E46 ///M3 is the M version E46 and puts out an amazing 333 HP and 262 lb-ft of torque at stock specs! There are an amazing amount of modifications for both the coupe and convertible models so read up and get started modifying your cars today!

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Old 05-16-2017, 03:38 PM   #1
shak89
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Join Date: May 2017
Location: Canada
Posts: 1
My Ride: 2001 E46 M3
ABS Chronically Engaged

2001 E46 M3 LSB

Hi Guys,

First time poster but have found these forums to be invaluable. Recently I was driving down a minor hwy on my way to work when the car in front of me stopped abruptly. I was at approximately 30 feet when I noticed and slammed on the brakes. Needless to say I ended up rear ending the poor Sonata (my fault). Cracked her bumper ever so slightly but no body damage to my vehicle. After exchanging info I attempted to move my car as I was backing up traffic and she would not move. The wheels were literally locked up. It was like trying to move with the handbrake up.

Had her towed to my mechanic who diagnosed it as a caliper malfunction. Replaced, test driven. Slamming on the brake and the issue re-occured. Unable to figure it out he sent the car to another shop who deal with electrical issues where they diagnosed it as a faulty ABS module. Replaced, same issue.

Now my guy tells me he's stumped. Take it to the dealer.

I've looked around and quite frankly I haven't had any luck on this issue that is NOT a seized caliper. No lights on the instrument cluster.

Help!
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Old 05-16-2017, 04:21 PM   #2
mooninite
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Join Date: May 2006
Location: Texas
Posts: 422
My Ride: M3, X5
Really hard to "internet diagnose" this problem. You need to get the codes read with INPA or ISTA-D. If nothing is showing up then I would guess your calipers and the hardware around them are shot. This includes guide pins, rotors, pads, and everything around it. Maybe you formed a bubble in your brake lines if they are still rubber OEM lines. You also may have cooked your brake fluid if you have not changed it in years. I don't know because I can't see your car. Good luck.

Last edited by mooninite; 05-16-2017 at 04:23 PM.
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Old Yesterday, 02:01 AM   #3
Commando
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Join Date: Sep 2011
Location: Western Australia
Posts: 955
My Ride: '02 325Ci MT '04 M3
Seems unlikely for 4 calipers to fail at the same time. Did your mechanics even run any diags? Can you?
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