How do you reset computer in 1998 Mazda 626?

To reset the computer in a 1998 Mazda 626, you can disconnect the negative battery cable for about 10-15 minutes to clear the system's memory. After reconnecting the cable, start the vehicle and let it idle for a few minutes to allow the computer to recalibrate. Additionally, you may want to check for any error codes using an OBD-II scanner if the check engine light is on. Remember to ensure that the radio and any preset settings are noted, as they may be lost during the reset.