One problem related to brake fluid leak has been reported for the 2008 Mazda MAZDA3. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2008 Mazda MAZDA3 based on all problems reported for the 2008 MAZDA3.
#1 air bag warning dash light remains illuminated and has stayed illuminated for approximately 1 1/2+ years. There is no Mazda dealership in my area and I initially believed it was my responsibility to replace or repair at my expense due to the vehicle's age. #2 brakes: vehicle was recently serviced and comprehensive safety inspected on 6 Nov 2018. I asked the shop to check the brake pedal for abnormal pressure. I felt the brake pedal was not maintaining a firm pedal push while driving, but at first felt firm then softened almost all the way to the floor board. I returned to the auto service to point this out and the representative responded no evidence of brake fluid leaking out and earlier while they drove it around their facility it felt fine, therefore it was ok to drive like this. Today is 3 December and it is still a mushy brake.