The used car buying checklist

Buying a used car safely comes down to three things: verify the car's history, inspect it carefully, and have an independent mechanic check it before you pay. Use the checklists below in order, and walk away from any car or seller that won't let you finish them.

Rules on titles, inspections, dealer disclosures and return rights differ by state, province and country, so confirm the local requirements where you buy and register the car.

Decide where to buy

Each source trades price against protection. There is no single best option, only the one that fits your budget and how much risk you are willing to manage yourself.

Source	Typical upside	Typical downside
Private seller	Often the lowest price, and you can speak with the person who drove the car.	Usually sold as-is, with little recourse if something goes wrong. You handle the title and payment yourself.
Franchise or independent dealer	Wider selection, trade-in and financing in one place, and some legal disclosure requirements.	Higher prices plus dealer fees and optional add-ons.
Certified pre-owned (CPO)	Manufacturer inspection standards and an extended warranty.	Costs more than a comparable non-certified car. A dealer's own "certified" label may not carry manufacturer backing.
Online retailer	Fixed prices, home delivery and often a short return window.	No test drive before you commit, and limited room to negotiate.

In the US, dealers must display a Buyers Guide on used cars showing whether the car comes with a warranty or is sold as-is. The FTC explains what it means in its guide to buying a used car from a dealer.

Check the VIN, history and recalls first

Before you spend time on a test drive, get the 17-character vehicle identification number (VIN). Run it through our VIN decoder to confirm the year, make, model, engine and trim match the listing. A mismatch is a reason to ask hard questions or move on.

Next, pull a vehicle history report. Look for accidents, branded titles (salvage, rebuilt, flood or lemon), the number of owners, use as a rental or fleet car, and gaps or reversals in recorded mileage. In the US, the federal National Motor Vehicle Title Information System (NMVTIS) lists approved providers that report title brands and odometer readings.

Finally, use the recall check tool to see whether any safety recalls are open. Recall repairs are done free by franchised dealers, but an unrepaired recall is something you want fixed before you buy, or at least scheduled.

Walk around and inspect it yourself

Look at the car in daylight, on level ground, with the engine cold. A cold start reveals problems that a warmed-up engine can hide.

• Panel gaps are even, and paint color and texture match on every panel.
• No overspray on rubber trim, rust bubbles, or fresh undercoating hiding corrosion.
• All four tires are the same brand, with even wear and adequate tread. Uneven wear can point to alignment or suspension problems.
• Glass is free of cracks, and the lights are clear rather than fogged inside.
• No fluid puddles under the car. Engine oil is not milky or gritty, and coolant is not oily.
• Belts and hoses are not cracked, and the battery terminals are free of heavy corrosion.
• Every window, lock, mirror, seat adjuster, light and the climate system work.
• The dashboard warning lights come on at start-up and then go out.
• The car comes with all the keys, the manual and any service records the seller has.

Test drive with a plan

Drive for at least 20 to 30 minutes on a mix of city streets, rough pavement and highway. Turn off the radio so you can listen.

• Start-up: The engine should start easily, without knocking, ticking or blue or white smoke from the exhaust.
• Transmission: Shifts should be smooth, with no slipping, delays or jerks.
• Brakes: The car should stop straight, without pulsing, grinding or a soft pedal.
• Steering and suspension: The car should track straight. Clunks over bumps or wandering at speed point to worn parts.
• Highway: There should be no vibration at 60 to 70 mph and no excessive wind or tire noise.
• Afterward: Check underneath again for new drips and look for any warning lights that appeared.

Get a pre-purchase inspection

If the car passes your checks, pay an independent mechanic you choose, not one the seller recommends, to inspect it on a lift. A good pre-purchase inspection covers the frame and suspension, signs of accident repair, leaks, the brakes, the exhaust and stored diagnostic trouble codes. For hybrids and EVs, ask for a battery health check.

Expect to pay roughly $100 to $250 at most independent shops, more for specialist vehicles. A seller who refuses to allow an inspection is giving you useful information: walk away. Use the mechanic's findings to negotiate, or to decide the car isn't worth it.

Check the title and watch for fraud

Title and lien checks

Ask to see the title before you agree to a deal. The seller's name should match their photo ID, and the VIN on the title should match the VIN on the dashboard and the driver's door jamb. Look for brands such as salvage, rebuilt or flood. If a lender is listed as a lienholder, the loan must be paid off before the title can transfer. The safest way to handle that is to complete the sale at the seller's bank or lender branch, where the payoff and title release can be handled together.

Flood damage red flags

• A musty or mildew smell, or heavy air freshener covering one.
• Silt, sand or water lines under the carpets, in the trunk or in the spare-tire well.
• Rust on seat rails, pedal brackets or screws under the dashboard, which rarely get wet in normal use.
• New carpet in an otherwise worn interior, or electrical features that work only some of the time.

Odometer fraud red flags

• Mileage in the history report that goes backward or has long unexplained gaps.
• Wear on the pedals, steering wheel, shifter or driver's seat that seems heavy for the miles shown.
• Service stickers or records that show higher mileage than the odometer.

Negotiate and complete the paperwork

Base your offer on recent sale prices for similar cars in your area, then adjust for mileage, condition and anything the mechanic found. Arranging financing in advance lets you negotiate on price alone. Our auto loan guide explains rates and terms, and the car payment calculator shows what a given price costs per month. At a dealer, negotiate the out-the-door price, and price-check add-ons such as service contracts the same way you would for a new car.

When you close the deal, make sure you have:

• A title correctly signed over to you, with odometer disclosure where required.
• A lien release, if the car had a loan.
• A bill of sale with the date, price, VIN, and the names and signatures of both parties.
• The Buyers Guide (from a US dealer) and any warranty or return policy in writing.
• Proof of insurance before you drive away.
• A plan to register the car and pay sales tax within your local deadline, plus any required safety or emissions inspection.

For private sales, pay with a traceable method such as a cashier's check or a bank transfer rather than a large amount of cash, and complete the exchange somewhere public or at a bank.

The bottom line

A good used car is one whose story checks out at every step: the VIN matches, the history and title are clean, the car drives well, and an independent mechanic signs off. If any of those links breaks, keep looking. There are always more cars, and walking away from a bad one costs you nothing.