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The Ultimate Used Car Buyer's Checklist

From Colorado Automotive Report & Service

Don't buy blind. Check these before you sign.

1Before You Even See the Car

  • VIN check: Run a Carfax or AutoCheck report (salvage title? accidents? odometer rollback?)
  • Market price: Compare asking price to KBB, Edmunds, and local listings
  • Seller red flags: Pushy "buy today" pressure, won't let you inspect, cash only demands
  • Service records: Ask for maintenance history (oil changes, timing belt, major repairs)

2Exterior Inspection (Walk Around First)

Body & Paint

  • Panel gaps: Uneven spacing = possible accident repair
  • Paint depth: Run your finger along panels. Feel for bumps (body filler = hidden damage)
  • Rust: Check wheel wells, door edges, under trunk, rocker panels
  • Tire wear: Uneven wear = alignment issues or suspension problems
  • Tire age: DOT code on sidewall (tires older than 6 years = replace soon)

Glass & Lights

  • Windshield cracks: Small chips spread; check all windows
  • Headlight fog: Oxidized headlights = cosmetic issue (but check if they work)
  • All lights work: Headlights, brake lights, turn signals, reverse lights

3Under the Hood (Engine Off First)

Fluids

  • Engine oil: Pull dipstick. Dark/gritty = neglected; milky = head gasket leak
  • Coolant: Should be bright green/orange; rusty brown = system neglect
  • Brake fluid: Dark = old; low level = possible leak
  • Power steering fluid: Pink or clear; brown/burnt smell = problem
  • Transmission fluid: Should be red/pink; brown or burnt smell = major issue

Leaks & Hoses

  • Visible leaks: Check ground under car, look for wet spots on engine
  • Hoses & belts: Cracks, fraying, or squealing noises = replace soon
  • Battery terminals: Corrosion (white/blue powder) = clean or replace battery

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4Interior Check

Seats & Controls

  • Seat wear: Excessive wear doesn't match low mileage = odometer fraud
  • All controls work: Windows, locks, mirrors, seat adjusters, A/C, heat
  • Dashboard lights: Turn key to ON (engine off). Check engine light, ABS, airbag warnings
  • Odometer: Does mileage match service records and wear?

Smells (Trust Your Nose)

  • Musty/mildew: Water leak or flood damage
  • Sweet smell: Coolant leak (heater core)
  • Burning oil: Engine issue

This is a lot to check on your own. Let a pro handle it →

5Test Drive (20+ Minutes, Highway + City)

  • Starts easily: No grinding, no hesitation, no smoke from exhaust
  • Steering: Straight tracking, no pulling left/right, no vibration
  • Brakes: Firm pedal, no grinding/squealing, stops straight
  • Transmission: Smooth shifts (auto) or clutch feels good (manual)
  • Engine: No hesitation, no knocking, smooth acceleration
  • Suspension: No clunks over bumps, no bouncing
  • Warning lights: Check engine light should turn off after starting; if it stays on = problem

6Under the Car (Bring a Flashlight)

  • Frame damage: Look for bends, welds, or kinks (accident damage)
  • Exhaust rust: Holes = replace soon
  • Oil pan/transmission: Wet = leaking
  • Suspension: Bounce each corner. Should settle in 1-2 bounces

When to Walk Away (Red Flags)

Seller won't let you:

  • Get a pre-purchase inspection
  • Test drive on highway
  • See maintenance records

Vehicle has:

  • Salvage title (unless you know what you're doing)
  • Check engine light on (unless diagnosed and priced accordingly)
  • Flood damage (musty smell, water lines, electrical gremlins)
  • Frame damage (major accident history)

Seller is:

  • Pushy ("buy today or it's gone")
  • Vague about history
  • Cash only with no paperwork

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