Pre-Purchase Inspection

A pre-purchase inspection is the one service where your customer isn't the person who owns the car — and your findings directly move thousands of dollars in a negotiation. The PPI's entire value is honest, documented, actionable information. Done well, it saves buyers from disasters and gives them leverage; done carelessly, it blesses someone else's problem onto your customer.

The PPI Standard: Document Everything

The professional standard for a PPI is a complete, honest report of all findings — not just the major ones — backed by photo and video documentation, rough repair cost estimates, and severity ratings for each item. The customer's plan is usually to negotiate the price based on what you find, and that only works if the report is thorough and credible. Your job is not to approve or veto the purchase in most cases; it's to convert the vehicle's true condition into actionable information. A verbal rundown in the parking lot doesn't meet the standard, and neither does a report that only mentions deal-breakers.

Structural and Title Red Flags

Some findings rise above the routine-repair category. Evidence of frame damage — welds on structural members, kinks in the rails, paint mismatch on structural components — is a fundamental problem on a modern unibody vehicle, because it compromises crash safety, alignment, and resale value. When you find it, the report should go beyond neutral listing: strongly recommend against the purchase or recommend a significant price reduction, and document the evidence with photos. This is one place where a PPI report takes a position.

A rebuilt (salvage) title is related but distinct. It typically knocks 20 to 40 percent off the vehicle's value and may conceal an undisclosed damage history, so it must be noted prominently in the report — the customer's negotiation should account for it. But a rebuilt title is not an automatic disqualification; some rebuilds are quality work. The standard is transparency: flag it clearly, explain the value impact, and let the customer decide with eyes open.

The Scan Tool Tells You What the Seller Won't

A modern PPI must include a scan-tool check, and it has to go deeper than current trouble codes. Pull current codes, pending and history codes, and — critically — the readiness monitor status. Here's the trick this catches: sellers sometimes clear codes right before the sale to hide a check engine light. Clearing codes also resets the readiness monitors, and those monitors take drive cycles to complete again. So a vehicle showing unset readiness monitors is telling you its codes were recently cleared and haven't had time to re-set — a strong signal that someone is hiding a problem. Document monitor status in every PPI report.

Specialized PPIs: Diesel Trucks and EVs

A diesel truck PPI adds items the standard checklist doesn't cover, and they matter because diesel repairs cost roughly 2 to 3 times their gasoline equivalents. First, look for emissions delete history — evidence that the DPF or EGR system has been removed. Deletes are illegal, and returning a deleted truck to compliance means expensive re-installation of the emissions equipment, so this finding alone can reshape the deal. Beyond that, inspect the fuel system for injector wear (injector rate testing where possible), verify glow plug function, and inspect the turbocharger.

A used EV PPI centers on one question: the health of the battery pack. It's the most expensive component on the vehicle, and its state of health — the percentage of original capacity remaining, read via a scan tool — determines the EV's realistic remaining life and its value. A standard mechanical inspection without a battery state-of-health assessment leaves the buyer purchasing blind on the component that defines the car. If you can't read the pack's health, say so in the report and recommend the customer get that data before money changes hands.