Well the motor in my 03 es300 blew apart. I couldnt find a good 3.0 and was looking at a 04 solara with a 3.3. Everything looked the same before pulling it. So i desided what do i have to lose on trying it. So with the old motor sitting next to the 3.3 everything was the same. Only things that were different was the throttle body and spacer,1 sensor in the head and knock sensor plug. Everything bolted up and the thing fired up. So if ur look to upgrade the worn out 1MK for a 3MK it is a simple change over.