How to clean Rear ABS Sensor hole/wheel bearing

I’ve spent the past year trying to diagnose a Right-hand turn/VSC issue that I previously posted about on this site. I have narrowed it down to an issue with my Rear-driver side ABS sensor. I bought a new sensor and when I went to replace it I noticed the old sensor covered in rust, some kind of liquid, and looks like the O-ring is broken. I think this caused a lot of water and other foreign materials to get into the ABS sensor hole.
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After replacing the ABS sensor the problem was noticeably worse. I feel that maybe I pushed more or moved around whatever is inside the ABS sensor hole making it worse. Is there a best way to clean out the area inside the hole/wheel bearing assembly? Do I have to take out the axel shaft?

 

Yes take the wheel hub apart and clean it out.

This is a wheel speed sensor. There is a gear inside the hole with teeth on it. The sensor counts the teeth as they rotate by. The ecu knows how many counts equates to a rotation of the wheel. This is where the signal comes from to run the speedometer.

If I remember right you can pull the brake rotor off and then the rest of the hub to get to the gear. Shouldn’t be too terribly bad.

While you are in there might just replace the gear. Rust on it will really throw off the count and they are not super expensive

 

Thanks for the reply! That’s what I figured I was going to have to do. I was just curious if there was another way. What’s the name of the gear? That’s not the wheel-bearing is it?