Well I bought an 03 GX470 that was in need of some TLC. Long story short is that it has the ABS, brake, and several other lights on and I had narrowed my trouble spot to the rear speed sensors. So I was checking the rear speed sensors and found that they both had pretty sizable wear marks in the side of them. I’m assuming this means I need to not only replace the sensors but also the rear bearings? I’m guessing that’s what is causing them to get worn but wanted some other input before buying bearings. Thanks in advance!

 

To check your bearings: