I saw one on another forum who had his motor mount fail. Mazda NA claimed the intake created extra torque, causing the motor mount to fail. They denied his warranty claim, despite weak motor mounts and bolts being a known issue on the car. The intake was the only mod on the car.
It seems...
Not entirely true. They also do dependability studies over a 3 year (I think) period. Mazda also scores very poorly there:
http://www.jdpower.com/autos/ratings/dependability-ratings-by-brand
I do think their ratings have become increasingly suspect over the years. Take Honda, for example...