on my ls430, i was able to use an aux cord adapter that high jacked the sat radio input. if someone else knows the name of it, they can share it or you can kyle at civic audio in michigan, they installed it, it was from one of their major vendors. there was also a bluetooth unit that worked the same way, but i much preferred the audio quality of the built in dac on my lg v20 phone.
i purchased my 06 in 2013 with 90k, i ran up about 250k on it. the issues i had were battery before 100k, a month after the battery, alternator crapped out, both easy fixes and can be done my an amateur with hand tools and jack. had issues with brakes warping rotors, turned out the brake lines were failing on the inside and leaving crap in the caliper pistons, i swapped the calipers and lines. front wheel bearings near 180k, rear shocks near 250k, timing belt roughly every 125k, ran mobil 1 extended performance oil with a purolator pure 1 filter, and then the boss filter when that came out, was going roughly 40k on oil changes. by about 350k, the entire suspension was ready for a refresh, other than that, every button, circuit, switch, control, interior light, worked, no rattles, or squeaks. will probably buy another, if i need another highway superstar. ps. the radiator fans crapped out, but i never bothered to change them and unless it was sitting in traffic in summer with the ac on, it never heated up, again, 99.99% of the miles on this car were highway cruising so they were never needed, i just kicked the heat on if it started heating up, seriously like maybe 3 years like this lol.