Originally Posted By: artificialist
There is probably more than one company that makes OEM Toyota rotors, because there isn't just one company that makes their brake pads.
Sumitomo and Advics are 2 other companies I can think of that made OEM Toyota brake parts.
Also, for all I know, the part you could buy at the dealer isn't always the same, either.
You are correct - there are several venders for Toyota's OEM stuff.
I can say with a reasonable authority that Mountain makes at least some of Toyota's rotors. If the o/p is looking to buy some, then an alternative would be to go to NAPA and have them look in their Altrom line which sources parts from the OE supplier. I've seen it first hand and believe it.