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Old 18th April 2018, 04:14 PM   #1
stevef182
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When replacing front ABS / wheel speed sensors on an E46 M3 is it a case of just swapping out the old for new and taking it for a drive or do the new sensors require coding / fault codes clearing? Thanks
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Old 18th April 2018, 04:28 PM   #2
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You should be able to drive it and it will clear, may take some ignition cycles and miles before it sorts itself out
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Old 18th April 2018, 04:33 PM   #3
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Error should clear after a while if not immediately. Be careful with the bolt holding the sensors it can be seized and often the sensor is seized into the hub! I had to drill them out on my last one!
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Old 18th April 2018, 05:33 PM   #4
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Thanks. Unfortunately I dont have time to do it myself so I planned on taking it to my local indy this weekend but he wants 120 + VAT to change it blaming the required 'recoding' for the price - seems steep to me.
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Old 18th April 2018, 05:40 PM   #5
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Quote:
Originally Posted by stevef182 View Post
Thanks. Unfortunately I dont have time to do it myself so I planned on taking it to my local indy this weekend but he wants 120 + VAT to change it blaming the required 'recoding' for the price - seems steep to me.
Coding erm don't think so.
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Old 18th April 2018, 06:21 PM   #6
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Take the wheel off, unplug the sensor, undo the bolt holding it to the hub.

Pride old sensor out, worst case the nose seizes in the hub and needs drilling out. An extra 10mins on the process and hardly a disaster as it'll be going in the bin anyway.

Push new sensor in, replace bolt, plug in sensor, stick wheel back on.

Abs runs a self check every time you turn on the ignition so the light should sort itself out although some systems will still show the light if it thinks a sensor is still dodgy and may take a short drive for it to see the motion of the hub before it realised it's ok.

Last edited by harrypevo; 18th April 2018 at 06:23 PM.
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Old 18th April 2018, 06:50 PM   #7
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^ For example E36 needs to go 10 restarts and drives without fault to self clear
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Old 18th April 2018, 07:01 PM   #8
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Getting the old one out is going to be the biggest issue...
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Old 19th April 2018, 08:39 AM   #9
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Thanks
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Old 19th April 2018, 08:50 AM   #10
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Quote:
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Coding erm don't think so.
I can only assume he means clearing the fault codes - regardless it still seems expensive to me
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