front glass brakes off twice in one year

I bought my honda brio smt in May 2014. In June 2014 the front glass broke off because of heat. We replaced it in July 2014. Again in March 2015 when temperature gone to 42 degree within a week front glass broke off because of heat. It is surprising that both times it broke off from the center near the mirror. You can not feel a crack from either side. There is no possibility of any physical damage to the car. In my opinior it is manufacturing defect but they do not agree. In our family we have santro, polo, maruti and amaze. In last 20 years it has never happened with any of our cars.

Areas of improvement Honda India shoud find out what is the problem and fix it. They should also replace the glass for free of charge as a gesture of good service. Then only they can say Honda is Honda.

noiseless engine,no fuel economy, body not sturdy, roof very thin metal sheet