The navigation system displayed a message like "Contact Alpine," so I replaced it. I contacted Alpine, and it seems repair is possible. The map has been updated to 2023. The ETC (Electronic Toll Collection) system works normally. The rear camera is blurry, likely because the inside of the lens has fogged up. As a bonus, I'm including a rear monitor. The image quality is somewhat reduced, but it has an impact. I am an amateur, so I don't know about the wiring. A car shop removed everything and bundled it together, so I don't think anything is missing.