Pre-Purchase Inspection: How to Get a Used Car Checked Before You Buy

A pre-purchase inspection, usually shortened to PPI, is the single most useful thing you can buy before buying a used car. A mechanic who has no stake in the sale puts the car on a lift, scans its computers, drives it and tells you in writing what is wrong and roughly what it will cost to fix.

The FTC's advice to used-car buyers is direct: a vehicle history report is not a substitute for an independent inspection, because a report may list accidents and flood damage but typically will not list mechanical problems. The FTC adds that an inspection is a good idea even if the car has been certified and inspected by the dealer and is sold with a warranty or service contract.

What a PPI is and is not

What a good inspection covers

Shops differ, so ask what is included before you book. A thorough PPI usually has the car on a lift and covers:

• Engine and transmission: leaks, fluid condition, noises, mounts, how it shifts when cold and hot.
• Computer scan: stored and pending fault codes, and whether codes were recently cleared (a sign someone reset a warning light before the sale).
• Brakes, tires and suspension: pad and rotor life, tire age and wear pattern, worn bushings, leaking shocks.
• Underbody and structure: rust, bent or welded frame sections, signs of collision repair or flooding.
• Body and paint: many shops measure paint thickness to find repainted panels.
• Electrical and climate: battery and charging tests, air conditioning performance, all accessories.
• Road test: alignment, vibration, braking, driver-assist features.

For hybrids and EVs, ask whether the shop can report on high-voltage battery condition. Not every shop can. See used EV battery health.

What it costs

You pay the inspection fee. The amount varies by shop and region and by how deep the inspection goes; a specialist for a European or electric car will often charge more than a general shop, and mobile inspectors price differently again. Call two shops, ask for the price and the checklist, and decide. Measured against the cost of one surprise repair on a used car, it is usually a small number.

How to arrange one

Step 1: Pick the shop before you fall for a car

Choose an independent shop that works on that brand, has good reviews, and is not suggested by the seller. Ask: "Do you do pre-purchase inspections, what do you check, how long does it take, and do I get a written report?"

Step 2: Ask the seller early

Raise it before you negotiate, not after. A script you can copy:

"I like the car. Before we talk numbers I'd like my mechanic at [shop name] to look at it. They can see it [day and time] and need it for about [length]. I'll pay for the inspection. If it comes back clean, I'm ready to move forward."

Step 3: Work out the logistics

• Dealer: many will let you take the car to a nearby shop, sometimes with a salesperson along or a copy of your license and insurance. The FTC notes that if a dealer will not let the car leave the lot, perhaps for insurance reasons, you may be able to use a mobile inspection service that comes to the dealer, or ask the dealer to bring the car to a facility you choose.
• Private seller: offer to meet at the shop. The seller keeps the keys and waits, which is fair to both of you.
• Car far away: mobile inspection services exist for exactly this. If you are buying at a distance, see buying a car out of state.

Step 4: If the answer is no

A dealer or seller who allows no independent inspection of any kind is asking you to take the whole risk. The FTC's suggestion is to consider going to another dealer. That is our advice too.

Reading the report

Ask the mechanic for a written report with a cost estimate for every needed repair, and make sure it lists the car's make, model and VIN. That is the FTC's recommendation, and it matters: a written estimate is something you can put in front of a seller.

Then call the mechanic and ask three questions:

1. "Would you buy this car at this price?"
2. "What needs doing now, what within a year, and what is just cosmetic?"
3. "Is there anything here that suggests an accident, flood or neglect?"

Sort the findings into three piles.

Using the results to negotiate

Keep it factual. An example with round numbers:

"The inspection found the rear brakes and two tires need replacing now. The shop's written estimate is $900. I'm still interested at $17,100 instead of $18,000, or at $18,000 with those items done and listed on the paperwork."

If the dealer agrees to repair something, get it in writing. On a dealer sale the FTC says spoken promises are hard to enforce and should be written on the Buyers Guide. For more on handling the conversation, see how to negotiate car price by email and when to walk away from a car deal.

Common questions

Is a PPI worth it on a cheap car? The cheaper the car, the larger one repair is as a share of the price. It is often more valuable, not less.

The dealer handed me their inspection sheet. Is that enough? It is useful to read, and a reasonable dealer will not mind you checking it. It was prepared by the party selling the car.

Should I do my own inspection first? Yes. Use the used car inspection checklist to screen out the obvious problems for free, then pay for a PPI only on the car you actually intend to buy.

What if I paid for a PPI and then walked away? Then it worked. You spent a little to avoid spending a lot.