How to Use the Used Car PPI Report Interpreter
Unlike some countries, there is no legally mandated inspection report for used car sales in the United States. Instead, buyers rely on an optional Pre-Purchase Inspection (PPI) from an independent mechanic and a vehicle history report from services like Carfax or AutoCheck. Neither is required by law — it's entirely up to the buyer to arrange them, which means many buyers skip this step and end up surprised by hidden problems after the sale.
This calculator lets you enter the same kinds of findings a mechanic would note during a PPI — accident and frame damage, oil leaks, undercarriage condition, and mileage relative to age — and turns them into an overall condition grade and a rough repair cost estimate. Frame damage carries the heaviest weight because it means the impact reached the vehicle's structure, which affects long-term safety and resale value far more than a simple bumper swap.
Treat the result as a starting point, not a final verdict — actual repair costs vary widely by make, model, and local labor rates. If your score lands in Grade C or D, it's worth paying for a full PPI at a trusted independent shop before you commit to buying, even though it's optional.
Frequently Asked Questions
No. Unlike some countries, there is no legally mandated inspection report for used car sales in the U.S. A PPI at an independent mechanic is entirely optional, but strongly recommended before buying.
Pull a Carfax or AutoCheck vehicle history report using the VIN. It shows accident records, title branding, and service history that a physical inspection alone can't reveal.