Recently my 04 LS430 was rear ended by someone. I would like some help with various questions. I need to replace the following: rear parking sensors and retaining clips and the rear bumper molding (silver band). The dealer wants a lot of money for the sensors, $250 each and $100 for the molding. I like to change the brake bleeder to the Speed Bleeder. What is the thread pitch and or size of the current brake bleeder? The radio reception is terrible, I like to convert the roof (cell phone) antennae to a radio antennae. Does anyone know how or is there a write I should know about? Lastly, on the last occasion my car was service by the dealer they recommended the lower control arms be change. The car drive fine. How can I tell?

Many thanks to everyone,