A pre-purchase inspection is carried out by a mechanic working for you rather than for the seller. It covers mechanical condition, structural integrity, fluid condition and stored fault codes.
It is the complement to a history report rather than a substitute. The report tells you what has been recorded about the vehicle. The inspection tells you what condition it is in now, including everything that was never recorded.
A seller who refuses to allow an independent inspection has given you your answer.
Why it matters
It is the only step that reliably catches unreported damage and imminent mechanical failure, and it costs a fraction of either.
How to check it
Use a shop you chose, not one the seller suggested. Ask specifically for a structural check on anything with accident or salvage history.
Does this apply to the car you are looking at?
Run the VIN or plate and see what is actually on record.
Related terms
Definitions are general guidance, not legal advice. Title rules, total loss thresholds and inspection requirements are set by each state and change over time, so confirm the position with the motor vehicle agency for the state the vehicle is titled in before relying on it.