One problem related to radiator has been reported for the 1997 Mazda 626. The most recently reported issues are listed below.
Engine light came on. Car overheated. Car brokedown on the way to the dealer's service shop. Had to push car three blocks the rest of the way. Was told that the radiator leaked into engine. Engine is damaged must be replaced. Have to buy new engine and new radiator. No other warnings before that.