The 2015 Mazda6 has 3 recalls, the most serious being an electrical fault on 2.5L engine models where the powertrain computer misreads the charging system and cuts power to it, potentially causing poor acceleration, loss of power steering, and inoperative windshield wipers while driving.
The parking brake on certain vehicles can develop an internal corrosion problem when water enters the rear brake caliper. Over time, the parking brake actuator shaft seizes up, and the brake may not fully engage when parked or fully release when driving away, leaving the vehicle either unsecured on a slope or dragging a partially applied rear brake. There is also a tire pressure monitoring concern: if all four tires lose pressure gradually and at roughly the same rate, the monitoring system may not trigger a warning light, leaving the driver unaware of underinflated tires that can overheat and fail suddenly at speed.