The AI Test-Drive Checklist: 12 Things to Check Before You Buy

Buying used doesn’t have to mean guessing. Use this 12-point, AI-backed checklist during your test drive and walk-around to spot costly problems fast.

1. Cold Start Behavior

• What to do: Ask the seller not to warm up the car before you arrive.
• Why it matters: A rough idle, extended cranking, or loud ticking/rattling noises on a cold start can indicate serious issues with engine components like valves, cam phasers, or the timing chain/belt.

2. Warning Lights & Messages

Look for any illuminated warning lights on the dashboard (Check Engine, ABS, Airbag, TPMS). If any are lit, it's a clear sign that the car's computer has detected a fault. Budget for a diagnostic scan to understand the specific problem.

3. Oil Leaks & Smells

Check under the car and around the engine bay for drips or dark, wet spots. Pay close attention to the valve covers (top of the engine) and timing cover (front of the engine). A distinct burnt oil smell after a short drive often points to a leaky gasket dripping onto hot exhaust components.

4. Transmission Feel

• Automatic: Notice any long delay or harsh clunk when shifting from Park to Drive? Does it struggle or shift roughly between gears (especially 1st to 2nd)?
• CVT: Listen for excessive droning or whining at steady speeds.
• Manual: Test for clutch slip by shifting into 3rd or 4th gear at a low speed and accelerating firmly. If the engine RPMs rise without a corresponding increase in speed, the clutch is worn.

Q: The car hesitates when shifting. What could it be?
A: This can range from low transmission fluid (simple fix) to a failing torque converter or solenoid pack (expensive repair). Avturo's Q&A feature can provide model-specific possibilities.

5. Steering & Suspension

Drive over some small bumps or an uneven road. Listen for clunking or knocking sounds, which can indicate worn bushings, control arms, or stabilizer links. If the car feels overly bouncy or "floats" after a bump, the shocks or struts are likely worn out. Check for uneven tire wear, which is a classic sign of alignment issues or worn suspension parts.

6. Brakes

During your test drive, perform a firm (but safe) stop. Does the car pull to one side? Do you feel a vibration or pulsing in the steering wheel or brake pedal? This often means the brake rotors are warped. A "mushy" or long-travel pedal can indicate air in the brake lines or worn-out components.

7. Cooling System

Keep an eye on the temperature gauge; it should rise to the middle and stay there. After the drive, look under the hood for any signs of leaks. Dried pink, green, or orange residue ("crust") around hoses or the radiator is a tell-tale sign of a coolant leak.

8. Electronics

Test everything. Power windows, door locks, mirrors, seats, sunroof, infotainment system, backup camera, and parking sensors. Intermittent electronic faults can be notoriously difficult and expensive to diagnose and fix.

9. Tires

Look for the four-digit DOT code on the tire's sidewall (e.g., "3221" means the 32nd week of 2021). If the tires are more than 6 years old, they need to be replaced soon due to age, regardless of how much tread is left.

10. Title & History Clues

Look for mismatched paint between body panels or signs of overspray on trim pieces, which suggest prior bodywork. Always ask the seller for service records and run a comprehensive vehicle history report (like CARFAX) using the VIN.

11. Noises by Speed

• Low Speed (Parking Lot): Turn the steering wheel to a full lock in both directions. Clicking sounds often point to worn CV joints.
• 30–45 mph: Listen for a humming or growling noise that gets louder with speed and changes pitch when you steer slightly left or right. This is a classic symptom of a bad wheel bearing.
• 60–75 mph: Feel for vibrations in the steering wheel or seats, which could indicate an issue with tire balance, the driveshaft, or warped rotors.

12. Final Sanity Checks

Does the car come with two sets of keys? Is the owner's manual in the glove box? Has it recently passed emissions/smog tests? Are there any unusual odors like mold, mildew, or heavy air freshener trying to cover something up?