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Old 06-09-2021, 05:36 PM   #1
jayydubbb
Scooby Newbie
 
Member#: 517340
Join Date: Aug 2020
Location: Philadelphia
Vehicle:
2007 WRX STI

Default 2018 WRX P0500 After Wheel Hub Replacement

Just replaced the front right wheel hub on my 18 WRX Limited w/ 30k miles. Had it all back together finally and on the first drive after getting up to speed everything lights up on the dash, ABS, VSC, CEL and so on. Car won't display my speed or selected gear (speedometer works, the digital display doesn't read). Scanned it and the code is P0500, vehicle speed sensor A malfunction. I bought an eBay wheel hub because I didn't feel like spending the $200 on an oem one. Is there a good chance that the hub I got is just trash and won't read with the abs sensor? I have read in the past that sometimes after changing the hub you just have to put the car through some drive cycles before it figures itself out and goes away. I tried cleaning the sensor off real good and resetting the light and it came back a second time.
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Old 06-09-2021, 08:16 PM   #2
Elbert Bass
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Member#: 283429
Join Date: May 2011
Chapter/Region: South East
Location: Down yonder.
Vehicle:
2016 Fuji Sunfire 03
Silver

Default

It could be the bearing doesn't have the reluctor ring like it should. I have seen cheap bearings for Subarus made that way.
--BUT--
It is more likely one of these issues:
Did you pull the ABS sensor out of the knuckle before swapping the bearing? You could have broken the ABS sensor since it sticks out between the axle flange and the bearing.
OR
was there a lot of rust and scale from the knuckle? The reluctor ring in the bearing is magnetic. Any rust or metal flake stuck on the reluctor (inner black or brown face of the bearing) will interfere with the sensor.
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Old 06-10-2021, 07:51 PM   #3
AliBenn
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Join Date: Nov 1999
Chapter/Region: TXIC
Location: Greatwood/Sgrlnd
Vehicle:
1998 /2005 STunIcorn
Acadia Green RS-T

Default

Excellent places to start^^^

Also
I have found the rockauto site good reference
Not to buy, but to look at the pictures of said part
To use as comparison

Sorry
Need to disassemble
Check your work
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Old 06-10-2021, 10:29 PM   #4
jayydubbb
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Member#: 517340
Join Date: Aug 2020
Location: Philadelphia
Vehicle:
2007 WRX STI

Default

Quote:
Originally Posted by Elbert Bass View Post
It could be the bearing doesn't have the reluctor ring like it should. I have seen cheap bearings for Subarus made that way.
--BUT--
It is more likely one of these issues:
Did you pull the ABS sensor out of the knuckle before swapping the bearing? You could have broken the ABS sensor since it sticks out between the axle flange and the bearing.
OR
was there a lot of rust and scale from the knuckle? The reluctor ring in the bearing is magnetic. Any rust or metal flake stuck on the reluctor (inner black or brown face of the bearing) will interfere with the sensor.
I unbolted and removed the sensor long before the old bearing came out of the knuckle. I had to remove the knuckle and take it to a buddy to have him press it out. I beat on the hub in every way imaginable and it would not budge with any amount of heat, sledgehammering, pb blaster, etc. The car has only seen 3 Pennsylvania winters and it was far more corroded than my 10 year old chevy with 100k miles on it. I was baffled that it was that locked in there. I digress.

I thought I cleaned the bearing and the sensor pretty well before install but maybe not. I ended up buying basically the cheapest hub I could find so I'm honestly assuming it's just a POS eBay part that doesn't work most of the time.
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Old 06-11-2021, 08:19 AM   #5
Elbert Bass
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Member#: 283429
Join Date: May 2011
Chapter/Region: South East
Location: Down yonder.
Vehicle:
2016 Fuji Sunfire 03
Silver

Default

Quote:
Originally Posted by jayydubbb View Post
I unbolted and removed the sensor long before the old bearing came out of the knuckle. I had to remove the knuckle and take it to a buddy to have him press it out. I beat on the hub in every way imaginable and it would not budge with any amount of heat, sledgehammering, pb blaster, etc. The car has only seen 3 Pennsylvania winters and it was far more corroded than my 10 year old chevy with 100k miles on it. I was baffled that it was that locked in there. I digress.

I thought I cleaned the bearing and the sensor pretty well before install but maybe not. I ended up buying basically the cheapest hub I could find so I'm honestly assuming it's just a POS eBay part that doesn't work most of the time.
Then it may be the bearing doesn't have the reluctor. That is the most common thing with cheap bearings. Quick and dirty - remove the axle nut, push the axle back as far as you can. See if you can get a screw driver or something made of ferrous metal near that dust seal on the inner side bearing (black or brown plastic between the outer bearing and hub flange and see if there are spots where the metal tries to stick. If it doesn't then buy a new bearing.

And yes, Subaru techs have several brutal and unique ways to remove bearing/hub assemblies on car. I think I have only had to remove one knuckle in the 700-800 bearings I have replaced - including the old pressed bearings.
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