Is it possible to reflash an old navigator with a new firmware?

Question

satellite navigation

There is a rear view camera with wireless signal transmission and there is a 2009 navigator (Garmin Nuvi).
Is it possible to connect programmatically? (in the navigator only a connector for power and SD).
PS Add. the display will take up free ports, but you don’t want to mount it in the salon

Answer 1

Garmin Nuvi without USB can be updated via SD card and Garmin Express software.
https://www.garmin.com/en-US/software/express/
No super new functionality will appear there. Especially when receiving a signal from a certain camera.