eeeric

In this era, where the unit is made by Denso the map info interchangeable. The system info is probably v22.

Did you try burn at the slowest speed possible?

I don't know your vehicle specifically but to keep air conditioning and existing speakers normally requires replacing the unit with an Android-type device ($600+ plus shipping/install), you'd have to order it from overseas, and then roll the dice on quality. Pretty risky (for electronics) given how harsh a car environment is, i.e. +70c temps in the sun. I wouldn't trust a no-label device to stay working for long. You can replace maps with an updated DVD/SD/HDD. These are pretty costly unless you can find a copy and replace yourself. Best value option is a quality, heavy-duty seat rail mount for an external phone or tablet ($150, another $100 to install or DIY). Don't get an air-vent mount, they will snap the vent plastics. You could check with a tradie on AirTasker to see if they have done and recommend any.