Got the tyre pressure warning light for the first time after owning the car. It came on after changing from summer to winter snow tyres and driving a few kilometers in to the trip (the winter tyres were lying in the garage after use last year and unknown to me the tyre pressures had dropped from 2.3 bar to just under 2.0). Filled air in all 4 tyres to 2.3 bar and was expecting to have to dive in to the owners manual in the middle of the journey to reset the tyre pressure warning light but that was not at all necessary. The car itself reset it after hardly 100 meters of drive. Good Mazda! My earlier BMW was a pain in the neck, it had to be manually reset after filling air in the tyres.