NHTSA Complaint #11546287 — 2009 MAZDA MAZDA6

* Drivers side (worst) and passenger side rear lower control arm. Both are available for inspection upon request. * The drivers side rear lower control arm rusted through and cracked near the point where it connects to the rear subframe. The right lower control arm did not yet visibly crack (it's still on the vehicle), but it is also severely rusted. If driven and either completely separated, loss of control as well as flying debris on the road would have been nearly certain. * I cannot drive the car to a dealer or service center. The problem is visibly obvious and online owners forums anecdotally indicate the problem is widespread. * The component is available for inspection. I have shown my mechanic and intend to take to a dealer. Because there was no accident or injury, thankfully, I have no cause for engaging police or insurance. * There was no warning/indicator in the vehicle. The first symptom of trouble was severe wear on the inside of the left rear tire. The vehicle then had a four-wheel alignment and suspension components were noted to be tight and adjusted into spec at that point. Some weeks later, we heard disturbing noises from the rear as we went over even small bumps in the road. We noticed the suspicious sound during a local drive and drove gently and directly home, so cannot say how much the partial break may have affected control at that point. Upon inspection, the rusted & cracked steel of the driver's side control arm was readily visible. Other notes: The rear subframe itself shows significant flaking and rust in comparison to the rest of the vehicle's undercarriage, but at least there appears to be more substance left to the metal of the subframe. Photos & measurements available upon request.