The 2014-2018 Mazda3 is the clean non-Toyota compact alternative: good driving dynamics, strong parts availability, and a U.S. model window that predates Mazda Connected Services. Mazda’s Connected Service manual says connected-service vehicles use a dedicated communication unit, and its U.S. target-model list begins with 2019 Mazda3.
This is not the default over the Corolla if standard active safety matters; it earns a card as the stronger non-Toyota compact path. That makes 2014-2018 the target window, subject to the same verification discipline as every other vehicle here. Run the VIN, inspect for aftermarket trackers, reset the infotainment system, delete paired phones, clear navigation/history data, and remove any prior-owner app access before treating the car as yours.