Kia Optima shattered back window issue on Kia Optima

Some Kia Optima owners report experiencing issues with shattered back windows, including instances where the rear window completely shattered while driving, as seen in a 2014 model. Other owners of the 2012 Kia Optima have reported similar problems, with the back rear glass shattering unexpectedly, even with no external impact. Additionally, some 2016 Kia Optima owners have faced window regulator failures, which can incur an average repair cost of $620. There are also reports of unusual window functionality, where drivers can roll down the back windows from the control panel but must use individual switches to roll them back up. If the back window shatters, it is advised to pull over safely, contact authorities, and document the incident promptly.