What should be done if the old mileage of a previous sticker is unavailable when applying a new sticker?

When applying a new inspection sticker and the old mileage is unavailable, it is critical to include the serial number of the vehicle on the application. Including the serial number helps maintain the integrity of the inspection process and ensures that each vehicle's inspection history is accurately recorded. The serial number serves as a unique identifier for the vehicle, allowing authorities to track its inspection records and any related issues.

Using the serial number instead of leaving the mileage blank, estimating it, or using the make and model, ensures that the application remains complete and follows the regulations set by the Pennsylvania inspection program. This practice enhances transparency and accountability, aiding in upholding safety standards across inspected vehicles.