Looks like it could be this part 48925-50030 Filter, Height Control
https://www.megazip.net/zapchasti-dlya-avtomobilej/toyota/lexus-rx-42409/mcu35-56640/mcu35r-awagkw-926292/height-control-auto-leveler-17924562?vin=1403329918
We have just used one of these Pure Highway 600 Car Digital Radio Adapter with Handsfree Calling from Halfords. It has option to tune to unused channel. Gives DAB & streaming for just over £100 (in sale). Works quite well & has everything in box