📋 Overview
A used car can be a great deal or a money pit, and the difference is a 30-minute inspection. Run this checklist in daylight before you hand over a deposit. If the seller refuses any of these checks, walk away.
📝 Step-by-Step Checklist
- Decode the VINPull the VIN from the dash and door jamb. They MUST match. Use the free NHTSA vinrcl.safercar.gov lookup or our /how-to-decode-a-vin guide for open recalls.
- Pull a vehicle history reportGet a Carfax or AutoCheck plus the free federal NMVTIS report (vehiclehistory.bja.ojp.gov). NMVTIS shows salvage, flood, and total-loss titles dealers can't hide.
- Check the title in personDemand to see the actual paper title. Look for "salvage," "rebuilt," "flood," or "lemon law buyback" stamps. A clean Carfax does not mean a clean title.
- Inspect for flood damageSmell the carpet, check under the dash for waterlines, and look for rust on screws inside the cabin. Full guide: /signs-of-flood-damage-on-a-used-car.
- Inspect for frame damageLook down both sides of the car at hood level for waves in the panels. Check for fresh undercoating hiding repairs. See /signs-of-frame-damage-on-a-used-car.
- Inspect for accident damageMismatched paint, uneven panel gaps, and new bolts on the hood or fenders are red flags. See /signs-of-an-accident-on-a-used-car.
- Check all fluidsPull the dipstick (oil should be amber to brown, not milky), check coolant color, and inspect transmission fluid (should be pink, not brown or burnt).
- Test drive in 4 modesCold start, stop-and-go, highway 65+ mph, and hard braking. See /how-to-test-drive-a-used-car and /things-to-check-on-used-car-test-drive.
- Get a pre-purchase inspection (PPI)Pay $100–$200 to have an independent mechanic put it on a lift. This is the single best $150 you will spend. Skip if the seller refuses.
- Verify mileage with service recordsCross-check the odometer against oil change stickers and Carfax service entries. See /how-to-spot-rolled-back-odometer.
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❓ Frequently Asked Questions
What is the most important thing to check when buying a used car?
A pre-purchase inspection by an independent mechanic. It costs $100–$200 and finds problems you cannot see in a driveway inspection. If the seller refuses, walk away.
Should I buy a used car from a private seller or dealer?
Private sellers are usually cheaper but offer no warranty and "as-is" sales. Dealers cost more but may include an implied warranty (varies by state). See /dealer-vs-private-party-used-car.
How do I check if a used car has been in an accident?
Run a Carfax, look for paint and panel mismatches in daylight, and have a mechanic inspect the frame. Carfax misses about 20% of accidents - only reported claims show up.
What mileage is too high on a used car?
Anything over 150,000 miles needs scrutiny. Modern cars regularly hit 200k+ with care. Service history matters more than the number. See /what-mileage-is-too-high-on-a-used-car.
Is a Carfax report enough?
No. Carfax only shows reported events. Combine it with NMVTIS (federal), a title check, and a mechanic's inspection for full coverage.
How much below asking price should I offer on a used car?
Start 10–15% below asking, then justify with specific issues. Average final discount is 5–10% off list. See /how-much-to-pay-below-asking-price-used-car.