There is a sticker on every vehicle on the driver's door or door jam area that is called the certification label. This label provides information regarding proper wheel size and tire size, among other information. On some vehicles, the label on the vehicle may be inaccurate.
Some optional trailer hitches may not have been properly welded during installation. The hitch may separate from the vehicle while in use, which could result in a crash.
One or more rear lights may fail due to a damaged wire in the trunk.