The Mazda CX-3 Mk1 (DK) (2015–2022) was Mazda’s stylish subcompact crossover, built on the Mazda 2 platform with the same SkyActiv engines and driver-focused cabin. Service it and several electronic items expect resetting. The oil service reset clears the maintenance message from the multi-information display after fresh oil — worth noting on diesels, which monitor oil dilution. A TPMS reset relearns tyre pressures after a rotation, the brake pad wear warning needs clearing once new pads are fitted, and a steering angle calibration follows any alignment work. Disconnecting the 12V battery resets the clock, audio presets and idle learn. Choose the reset routine that matches your CX-3 from the procedures shown directly below.