How do you fix the speedometer on a Mazda vehicle?

To fix the speedometer on a Mazda vehicle, first check the vehicle's fuse related to the instrument cluster, as a blown fuse can cause the speedometer to malfunction. If the fuse is fine, inspect the vehicle's speed sensor, usually located on the transmission, and replace it if it's faulty. Additionally, ensure that the wiring and connections to the speed sensor and instrument cluster are secure and free of corrosion. If issues persist, a diagnostic scan may be necessary to identify any underlying electronic problems.