Porsche Cars North America, Inc. identified that certain 2008-2019 Porsche Cayenne and Macan vehicles did not have required markings on their rims as per the Federal Motor Vehicle Safety Standard (FMVSS) 110. The missing markings included the "E" designation symbol and the "DOT" certification symbol. Porsche argued that this noncompliance does not affect safety because the rims and tires are correctly matched and identified through other necessary labeling. The National Highway Traffic Safety Administration (NHTSA) agreed with Porsche's assessment, deeming the noncompliance inconsequential to vehicle safety, and granted Porsche's petition for exemption from notifying owners or providing a remedy for this issue.
Simple Explanation
Porsche made a small mistake by not putting certain marks on the wheels of some cars, but the people in charge said it's okay because it doesn't make the cars less safe.