Mazda MAZDA3 owners have reported 1 problem related to rear window defogger (under the visibility category). The most recently reported issues are listed below. Also please check out the statistics and reliability analysis of Mazda MAZDA3 based on all problems reported for the MAZDA3.
Rear glass explosion on 2010 Mazda 3 sedan. Morning 16 degrees f. Approached my car in the morning and heard a crackling noise. I thought the sound was ice. I started the car and the rear defogger. As I sat in my driveway . . . Approximately 30 seconds after turning on the defogger. The rear glass exploded with a load noise. Glass was thrown into the rear passenger seats. The car is 4 months old and under warranty. I took the car to the dealer and they would not repair under warranty. I called Mazda customer care at 1-800-222-5500 and was told that this is due to outside influence (ie the same as if a tree branch fell on the car). He indicated that I should expect that this could happen in the cold weather. I can not believe that I should expect that my rear window can explode in cold weather. If my children were in the rear seat they would have been potentially seriously injured by thrown glass.
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