Not quite true. I took our car in for a weird noise and they rebuilt just part of the transmission. The noise happened again and then they decided to replace the entire transmission. Both repairs were under warranty.
Well it is what happens when the item is out of warranty the issue at hand.
I am pretty sure that if my fusers went bad within the warranty period I might have had them replaced under warranty, or at least there are several reports that Brother did that.
My rant was only about the absurd prices of the spares.
