You cannot install the wrong firmware. Doing so will hard-brick your unit (black screen, no recovery).
Users have reported successful updates to versions like 2023-12-27 MCU and corresponding system patches in early 2024. Android Auto Firmware Latest Update 8227l
: Many 8227L users update specifically to improve compatibility with You cannot install the wrong firmware
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While not a flagship device, your car radio is still vulnerable. Updates after mid-2024 include backported security patches for known exploits.