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Old 05-28-2012, 06:10 PM   #1
maxman2k
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Yaw rate sensor - Question on diagnostic and replacement

Hi all,

Recently the DSC and Brake lamp (yellow - when parking brake is pulled it changes to red) has lit up on my 2001 325cic.

When scanned via PASoft 1.4 the following error codes were pulled:

5E3C [24124] Yaw rate sensor not plausible
5E38 [24120] Yaw rate sensor electrical faulty

I tried to clear the error codes via PASoft to no avail. Is there another tried-and-true method that I can try to reset the light to see if it was a fluke? I am asking because nothing unusual happened before the DSC+Brakes lit up, and the drivability now is the same as before (besides the fact that DSC is now disabled).

If not, I guess the worst case scenario would be pulling up the driver's seat to replace the sensor. After extensive research on the forum and the web, it seems that the yaw rate sensor is called differently at different places (speed sensor, rotation rate sensor, yaw rate sensor, just to name a few). However, I have narrowed it down to 2 possible part numbers:

37146781405 - ~$88
http://www.ecstuning.com/Search/37146781405/ES242427/

34526754289 - $440
http://www.ecstuning.com/Search/34526754289/ES63112/

Were there any fellow members on E46 who had this issue before and replaced the part themselves? If so, would you kindly help by identifying the correct part that should be replaced? Also, were there any additional programming required after replacing the sensor?

Thank you very much for your help!
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Old 06-10-2012, 07:25 PM   #2
Dippinwandy
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Did you ever find out which one it was ?
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Old 06-21-2012, 02:31 PM   #3
Dippinwandy
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Did you ever find out which one it was ?
Anyone ?
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Old 06-26-2012, 05:09 AM   #4
Dippinwandy
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No one at all ?
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Old 08-30-2012, 02:29 PM   #5
wmarcel
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I have the same problem. DSC and brake light (orange) turned on by itself at less than 40mph speed in a straight line, heard braking noise as if DSC engaged like in an uncontrolled maneuver. Fault code detected 5E38 Rotation Rate Sensor.

So, I believe it's the Acceleration Sensor aka Yaw sensor which would be this link:

http://www.ecstuning.com/BMW-E46-325...S592/ES242427/

Can anyone else confirm it is this part? It's apparently under the driver's seat. Thanks!
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Old 08-30-2012, 02:45 PM   #6
LeMansteve
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Can you get under or remove the seat to look at the sensor itself to confirm the part number?
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Old 08-30-2012, 04:10 PM   #7
Dippinwandy
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The yaw sensor is the $400 one. But i dont know if the rotation sensor is the same as the yaw sensor.
My code actually says faulty "YAW sensor"
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Old 08-30-2012, 04:18 PM   #8
Zell
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One way to test it would be to just spin your vehicle around and see if it produces a voltage

The scary thing is that would actually probably work...



I do not endorse this.
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Old 09-14-2012, 08:51 AM   #9
Lbert
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Do you need to have the car's computer recoded or reprogramed if the speed sensor or acceleration (yaw) sensor is replaced?
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Old 09-16-2012, 04:52 AM   #10
Dippinwandy
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If its a new one then yes
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Old 09-29-2012, 12:13 AM   #11
Wickedly
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Anyone find one which one is it?
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Old 09-29-2012, 02:29 AM   #12
Dippinwandy
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Its the $400 one. Unfortunatly.
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Old 10-07-2012, 05:58 PM   #13
Lbert
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If its a new one then yes
Did you have the dealer recode after you installed a new yaw sensor and how much did you pay?
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Old 10-08-2012, 06:18 PM   #14
Dippinwandy
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Did you have the dealer recode after you installed a new yaw sensor and how much did you pay?
I never bought a new one. I purchased a used one from a fanatic here and it happened to be the same year and model as mines so i didnt need to have it coded. But it still didnt fix my problem though.

Last edited by Dippinwandy; 10-08-2012 at 06:19 PM.
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Old 10-08-2012, 10:45 PM   #15
Lbert
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Sorry to hear your problem has not been resolved. I am about to buy a new yaw sensor and I have a Bavavarian Technic unit to register the sensor to the car.
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Old 10-08-2012, 11:03 PM   #16
Dippinwandy
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Sorry to hear your problem has not been resolved. I am about to buy a new yaw sensor and I have a Bavavarian Technic unit to register the sensor to the car.
Good luck man. Do you happen to know what codes your car is giving?
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Old 10-08-2012, 11:09 PM   #17
Lbert
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Good luck man. Do you happen to know what codes your car is giving?
5E3C, 5E4F, and 5E38
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Old 10-09-2012, 02:08 AM   #18
Dippinwandy
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I have those sane ones but i also have 5E19 and 5E26. And 5E26 says power supply sensors so i believe this is where my problem is.
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Old 10-09-2012, 10:06 AM   #19
Lbert
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I have those sane ones but i also have 5E19 and 5E26. And 5E26 says power supply sensors so i believe this is where my problem is.
In your case, I wonder if the 5E19 and 5E26 caused the yaw sensor to give a faulty error codes due to the fact it was receiving incorrect information from the power supply sensors. Maybe your original yaw sensor is still good. Perhaps reset and clear the codes and see if the same codes (5E19 and 5E26) come back.

ECS Tunning is out of the yaw sensor. I will need to search for an alternate supplier.
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Old 10-10-2012, 06:37 PM   #20
Dippinwandy
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I think so too but im not sure where the yaw sensor gets its power from?
I tried deleting the codes but they wont go away..
Try searching on google for the yaw sensor. I found a couple of sites a while ago but ecs had the best price on it.
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