The Mazda Connect system (Commander dial + center screen) is reliable but slow. Firmware updates help, but the unit can freeze or reboot. More annoyance than failure, but expensive to replace.
Test all infotainment functions: nav, Bluetooth call and audio, radio, backup camera. Time how fast it wakes up from cold start — sluggish but functional is normal; failing to boot or constant reboots is a defect.
Est. cost: $800-$1,500 CMU replacement
Source: Mazda community documentation