I have never opened a modern one but you could if as Nigel said it not a uC with onboard mask programmed memory. There is a good chance the memory would be surface mount. Rip is not a good description of the removal and replacement process. If you were lucky you could find an automotive computer with a socketed memory. You might try looking at GM cruise controls from the 80's.
IMHO there is not much pont in doing so. You can buy a uC for under $5 with as much or more processing power. Reuse the case if it strikes you fancy.