Table 1 shows one common structure related problems of the 2009 Audi Q5.
| Problem Category | Number of Problems |
|---|---|
| Body problems |
I am reporting a potentially serious safety defect involving the rear subframe/crossmember of my 2009 Audi Q5. I discovered significant corrosion on the vehicle's rear subframe, which is a structural component supporting the rear suspension and rear axle assembly. The corrosion is substantially more than normal superficial surface rust. There is visible rust scaling and loss of material in areas of the rear subframe. The affected area was partially concealed by the factory-installed plastic stone guards/shields. Because these plastic covers obscure the subframe, the extent of the corrosion is difficult to identify during a normal visual inspection unless the covers are removed. I am concerned that continued corrosion could reduce the structural integrity of the rear subframe and potentially compromise the mounting points for the rear suspension or rear axle components. A structural failure of the rear subframe could result in unexpected changes in wheel alignment, suspension movement, loss of vehicle control, or other serious safety consequences. This issue is particularly concerning because the corrosion can develop underneath the plastic protective covers and may not be visible to the vehicle owner during normal operation. Safety concern the rear subframe is not merely a cosmetic body panel. It is a structural component associated with the rear suspension and axle assembly. If corrosion continues to remove structural material, a suspension mounting point or section of the subframe could potentially weaken or fail under normal driving loads. A failure while the vehicle is being driven, particularly at highway speed, could potentially result in loss of vehicle control. There were no dashboard warning lights or electronic warnings indicating this condition. The problem was discovered through physical inspection of the underside of the vehicle. Possible design/corrosion mechanism the factory-installed plastic stone guards appear to cover portions of the rea.