One problem related to gas recirculation valve (egr valve) has been reported for the 2001 Mazda 626. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2001 Mazda 626 based on all problems reported for the 2001 626.
2001 Mazda 626 right rear tire sidewall split in two areas. Consumer states that left rear tire was inspected and had similar cracking forming. Consumer was informed that the warranty does not cover that type of damage. The wiper blades were replaced. The engine light illuminated due to a bad egr flow which was clogged due to carbon build-up.