What actually is this?
TBC the two arrows are pointing to the same thing; the left arrow is pointing to the circular part of the Thing and the right arrow is pointing to the side part of the Thing.
Is it actually just part of the disk? Is it separate? Can it be replaced on it's own?
Is it easy enough to replace, or, is it more like fooling with the axle??
On my (previously mentioned :) ) lexus IS 350 C, this is the rear wheels.
It's the only thing that isn't factory-new on this low-mileage 2012 so it seems a shame!
(*) FTR the brakes seem a touch soft (suspiciously long pedal travel) so as well as having the fluid bled/replaced, it may be advisable anyway to replace the pins? calipers? etc. If so could do it all at once.