1.
- put shifter on N, screw off shifter
- open up center console
- pull the whole heated seat module straight up, it will come up. disconnect
- you will be able to pull up the "back" part of the shift plate area (close to center console)
- once it's up, the only point holding it are two clips right below the radio
- pull the shift plate towards the back of the car and a bit angle up. jiggle a bit and it will come off
- once it's out, you will see the TPS unit right below the radio
- unplug BOTH plugs, one small on the right and one bigger one on the left
- put everything back and enjoy
2.
http://cgi.ebay.com/ebaymotors/TRUNK-LIFT-SUPPORTS-STRUTS-2002-2003-2004-LEXUS-SC430-_W0QQcmdZViewItemQQhashZitem27b1db17bfQQitemZ170487650239QQptZMotorsQ5fCarQ5fTruckQ5fPartsQ5fAccessories
5 minute job
3.
Any aftermarket ones will work or you can install a camera hooked up to the nav screen
4. Yes, Im pretty sure the harness you need is mentioned on here if you search