jmsmiff

Anyone replaced or know how to replace these? I'm still not 100% sure what/where they are except the dealership recommended replacing them stating they were worn.

NClextech

The caster bushings on the LS430 are pressed into a bracket that mounts onto the rear of the front lower control arm. When they are worn the bushing will crack. They have been known to cause a vibration while driving or braking. If the bushing is worn bad enough the will leak some type of fluid and some will make noise. The new bushings will need to be pressed in, and i would suggest replacing with OEM parts!!! Hope this helps, i have replaced many of them and not a job for a novice. Would suggest an alignment after replacemenf as well.