ABS Issue need some ideas for what is next

eengler2013 · 12-27-2023, 08:36 PM

This is my 1st post, I have a 2011 e90 328i X sedan with N52 engine, GM 6L45 trans. The last couple of months I have performed many maintenance items as well as fix various oil leaks: still have various codes being displayed. Using a foxwell scanner the one issue I can’t seem to figure out are these codes: 2FE4, 581C, 5E3B, 55C6. Per the scanner, it is telling me the rear left wheel speed sensor is not functioning properly. I purchased a cheap sensor from Oreilly’s, but when I was in the process of removing the sensor, I noticed what appeared to be a mice nest in the void, it also appeared that the mice had chewed thru the wiring exposing the wire. When reviewing the speed on the scan tool, it appears that the sensor occasionally “cuts” out. Before replacing the sensor, I spliced a new solid core wires where the mice chewed, then when for a drive, with the original sensor, still no change on the scan tool, then I replaced the original sensor with the O’reilly part then went for a test drive. The O’rielly sensor had no input. Upon further investigation does the rear cv axle have an ABS band? I could not see one as i rotated the wheel while looking down the sensor hole. I really could use some suggestions. I also broke the blue locking tab that the sensor plugs into, as of now I have reinstalled the original sensor and taped the connectors together, but have not had a chance to drive it again.

Bims328i · 12-28-2023, 11:42 AM

It doesn't appear to have an external reluctor wheel. Perhaps it is integrated or there are magnets inside the axle assembly.

I would suggest getting a genuine sensor replacement.

Not sure if it is your exact year but reference via Real OEM website.

Axle:
https://www.realoem.com/bmw/enUS/sho...diagId=33_1252

Speed Sensor:
https://www.realoem.com/bmw/enUS/sho...diagId=33_1230

eengler2013 · 12-29-2023, 01:59 PM

Bims328i, thanks for the information. I confirmed that the rear passenger does not have the ring, so it must be in the bearing. Now I am thinking it is the bearing that needs to be replace.

Bims328i · 12-29-2023, 11:42 PM

Wouldn't it need to be something on the hub of the axle?

Checking the Bently manual it appears there is a ring of magnets.

Now I'm curious where these "ring of magnets" are located in the carrier.

lmandjes · 03-16-2024, 03:59 PM

Did yousolve your problem,where is the ring of magnets located?

12-27-2023, 08:36 PM	#1
eengler2013 Registered 0 Rep 3 Posts Drives: 2011 328i X Join Date: Apr 2023 Location: Indianapolis iTrader: (0)	ABS Issue need some ideas for what is next This is my 1st post, I have a 2011 e90 328i X sedan with N52 engine, GM 6L45 trans. The last couple of months I have performed many maintenance items as well as fix various oil leaks: still have various codes being displayed. Using a foxwell scanner the one issue I can’t seem to figure out are these codes: 2FE4, 581C, 5E3B, 55C6. Per the scanner, it is telling me the rear left wheel speed sensor is not functioning properly. I purchased a cheap sensor from Oreilly’s, but when I was in the process of removing the sensor, I noticed what appeared to be a mice nest in the void, it also appeared that the mice had chewed thru the wiring exposing the wire. When reviewing the speed on the scan tool, it appears that the sensor occasionally “cuts” out. Before replacing the sensor, I spliced a new solid core wires where the mice chewed, then when for a drive, with the original sensor, still no change on the scan tool, then I replaced the original sensor with the O’reilly part then went for a test drive. The O’rielly sensor had no input. Upon further investigation does the rear cv axle have an ABS band? I could not see one as i rotated the wheel while looking down the sensor hole. I really could use some suggestions. I also broke the blue locking tab that the sensor plugs into, as of now I have reinstalled the original sensor and taped the connectors together, but have not had a chance to drive it again. Attached Images
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12-28-2023, 11:42 AM	#2
Bims328i DIYer 265 Rep 303 Posts Drives: 2008 328i E90 SULEV Join Date: Jul 2020 Location: United States iTrader: (0)	It doesn't appear to have an external reluctor wheel. Perhaps it is integrated or there are magnets inside the axle assembly. I would suggest getting a genuine sensor replacement. Not sure if it is your exact year but reference via Real OEM website. Axle: https://www.realoem.com/bmw/enUS/sho...diagId=33_1252 Speed Sensor: https://www.realoem.com/bmw/enUS/sho...diagId=33_1230 Attached Images
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12-29-2023, 01:59 PM	#3
eengler2013 Registered 0 Rep 3 Posts Drives: 2011 328i X Join Date: Apr 2023 Location: Indianapolis iTrader: (0)	Bims328i, thanks for the information. I confirmed that the rear passenger does not have the ring, so it must be in the bearing. Now I am thinking it is the bearing that needs to be replace.
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12-29-2023, 11:42 PM	#4
Bims328i DIYer 265 Rep 303 Posts Drives: 2008 328i E90 SULEV Join Date: Jul 2020 Location: United States iTrader: (0)	Wouldn't it need to be something on the hub of the axle? Checking the Bently manual it appears there is a ring of magnets. Now I'm curious where these "ring of magnets" are located in the carrier. Attached Images
	Appreciate 0 Quote

03-16-2024, 03:59 PM	#5
lmandjes New Member 2 Rep 5 Posts Drives: 328XI Join Date: Aug 2016 Location: Cambridge MA iTrader: (0)	Did yousolve your problem,where is the ring of magnets located?
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