On my RDX, Screen would randomly go black while reversing, and the mechanic arranged diagnostics where a loose camera harness connection was secured & clear...
My Lexus RX had a constant squeaking noise while braking. They replaced the brake pads and resurfaced the rotors, and now it stops smoothly and quietly.
Doors stopped unlocking consistently even with a new battery in the key fob; Josh traced it to a failing door handle sensor and replaced it, convenience...