If a driver fails to take the SPE within 30 days, what will PennDOT send them?

The correct answer is that PennDOT will send a warning letter to the driver who fails to take the SPE within 30 days. This warning letter serves as a notification to inform the driver of the missed requirement and the potential consequences if they do not comply with taking the examination. It emphasizes the importance of adhering to the timeline set by PennDOT for fulfilling obligations related to driver's license requirements, thus prompting the driver to take necessary action before facing stricter penalties.

In terms of the other options, a suspension notice is typically reserved for situations where a driver has already been non-compliant or has accrued significant violations. A reminder to take the exam may imply ongoing communication, but PennDOT does not usually issue reminders after a deadline has passed. A license renewal application does not pertain to the specific scenario of missing an SPE, as it relates to a different process in maintaining a valid driving status.