📋 Overview
Roughly 20% of accidents never make it to Carfax - either insurance was never involved, or the report was lost in a private sale. Visible signs of repair are the only way to catch them. Inspect in daylight, ideally with the car clean and the sun at your back.
📝 Step-by-Step Checklist
- Check panel gaps with a coinEvery gap (hood-to-fender, door-to-door, trunk-to-quarter) should fit one US dime on edge - about 4mm. A wider gap on one side is repair work.
- Look for paint mismatchStand 10 feet back and check color in direct sunlight. Different fenders should reflect light identically. Slight color shift = repaint.
- Find paint oversprayOpen the hood and trunk. Look at door jambs, weatherstripping, plastic trim, and rubber seals. Paint overspray on rubber = panel was repainted.
- Use a paint thickness gaugeA $30 paint depth gauge from Amazon reads 4–6 mils on factory paint and 10–25 mils on repaints. Test every panel.
- Look at the bolts on the hood and fendersOriginal bolts have a body-color paint mark from the factory robot. Shiny new bolts mean the panel was unbolted for repair or replacement.
- Check the dates on the windowsEvery original window has a date code etched in the corner. If one window's date is months or years newer than the rest, it was replaced - possibly from a break-in or a rollover.
- Inspect the airbag coversLook at the steering wheel and dashboard airbag cover seams. Misaligned or aftermarket-looking covers mean the airbag was deployed and replaced.
- Inspect the radiator supportOpen the hood. The radiator support is the front structure. Wrinkles, weld beads, or fresh paint here = front-end collision.
- Check seat beltsMost seat belts have a date code on the tag near the buckle. Newer than the build date = replaced after a deployment.
- Run Carfax + NMVTIS + a mechanic inspectionEven with all 3, an independent PPI on a lift catches the most. See /how-to-check-a-used-cars-history.
🔗 Related Guides
❓ Frequently Asked Questions
Will an accident always show on Carfax?
No. About 20% of accidents are not reported to any data source Carfax uses. Visual inspection is the only way to catch these.
How can I tell if a car has been repainted?
Look for color mismatch in sunlight, overspray on rubber/plastic, and use a paint thickness gauge. Factory paint is 4–6 mils; repaints are 10–25 mils.
Is a minor fender bender a dealbreaker?
No, if it was repaired properly and the frame is undamaged. Cosmetic-only damage typically lowers value 5–15%.
What is the most expensive accident damage?
Frame/unibody damage. See /signs-of-frame-damage-on-a-used-car. Airbag deployment is also costly - full system replacement runs $3,000–$5,000.
Should I avoid every car that's been in an accident?
Not necessarily. A properly repaired minor accident is fine. Frame damage and airbag deployment are dealbreakers.
How much value does an accident take off?
Minor cosmetic: 5–15%. Major panel replacement: 15–30%. Frame damage: 30–50%. Airbag deployment: 20–40%.