As far as i remember, there were 2 units removed? Amp and power unit? Was quite a lot of dashboard etc. that needed to be removed and the new cradle is a little fiddly when attaching to the heating control unit. Think additional cabling was also needed for the new head unit. My mate owns a car audio dealers so he did it all for me, luckily he did the same to another lexus a few weeks previous so he was well clued up on what was needed! Seems to be a lot of speakers in the boot, is the single one on the right a sub of some kind?