So I recently got a toyota ia 2018 model and just wanted to let people know that it seems like the wiring harness has changed . I tried to install a PAC line output converter for mazda oem so i can hook up my kicker hideaway and it turns out the oem pac for mazda doesn't fit this model year. The connector to the amp in the car is too small. Doesn't look like there's one out there for this model year either. The amp and HU in the car are still branded mazda however, so I'm not sure why the change was made. Thought I should let everyone know.