Wheel speed sensors

Handyrandy23 · 05-04-2021, 11:29 AM

So i just replaced all four wheel speed sensors and the front two read reverse rotation while the rear two read forward???? any ideas?

gbalthrop · 05-04-2021, 12:55 PM

That'll shorten your wheelbase in a HURRY!

What are you using to read wheel direction -- INPA?
What were the readings of each wheel, Rotation Direction & Wheel Speed, BEFORE you replaced Speed Sensors?
What Brand & Part# Replacement Sensors did you purchase? All 4 Same?
If moving FORWARD @ 5 to 10 MPH, what Dir & Spd Values for each wheel are read?
Is/Are your DSC, ABS, 4x4 warning lights on?
What Fault Codes are read in DSC Module & with WHAT Scan Tool or Diagnostic Software?

Unless there is something ELSE you didn't cover, it would seem to be an adaptation glitch that may work itself out if you drive "around the block" a few times, reverse for ~20 feet, etc. My main concern would be speed reading and no DSC Fault Codes that prevent ABS and cause warning lights.
George

Handyrandy23 · 05-04-2021, 02:52 PM

yes inpa and bought the sensors before i had the software. got all four at same time rear ones are fine and all four are reading wheel speed the same. They are some cheap chinese sensors and after hours of research im thinking that is the problem. i will have to go pull the codes again. there were a lot lol.

05-04-2021, 11:29 AM	#1
Handyrandy23 Registered 0 Rep 4 Posts Drives: 2006 325xi wagon Join Date: May 2021 Location: Pelham Alabama iTrader: (0)	Wheel speed sensors So i just replaced all four wheel speed sensors and the front two read reverse rotation while the rear two read forward???? any ideas?
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05-04-2021, 12:55 PM	#2
gbalthrop Brigadier General 2781 Rep 4,108 Posts Drives: 2007 328xi E91 Join Date: May 2017 Location: Fairfax Co, VA iTrader: (0)	That'll shorten your wheelbase in a HURRY! What are you using to read wheel direction -- INPA? What were the readings of each wheel, Rotation Direction & Wheel Speed, BEFORE you replaced Speed Sensors? What Brand & Part# Replacement Sensors did you purchase? All 4 Same? If moving FORWARD @ 5 to 10 MPH, what Dir & Spd Values for each wheel are read? Is/Are your DSC, ABS, 4x4 warning lights on? What Fault Codes are read in DSC Module & with WHAT Scan Tool or Diagnostic Software? Unless there is something ELSE you didn't cover, it would seem to be an adaptation glitch that may work itself out if you drive "around the block" a few times, reverse for ~20 feet, etc. My main concern would be speed reading and no DSC Fault Codes that prevent ABS and cause warning lights. George
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05-04-2021, 02:52 PM	#3
Handyrandy23 Registered 0 Rep 4 Posts Drives: 2006 325xi wagon Join Date: May 2021 Location: Pelham Alabama iTrader: (0)	yes inpa and bought the sensors before i had the software. got all four at same time rear ones are fine and all four are reading wheel speed the same. They are some cheap chinese sensors and after hours of research im thinking that is the problem. i will have to go pull the codes again. there were a lot lol.
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