Buying a Used Car? The Pre-Purchase Inspection Checklist

Aug 8, 2026 · 5 min read

A mechanic inspection is the cheapest insurance before buying a used vehicle. Here is what a thorough one should cover.

A pre-purchase inspection (PPI) can save you thousands. A proper one should cover:

• Engine: compression/leak-down where practical, oil and coolant condition, leaks, unusual noises, smoke color.
• Transmission/drivetrain: shift quality, fluid condition, axle boot condition, clutch feel.
• Brakes: pad/rotor thickness, fluid condition, ABS function.
• Suspension/steering: bushing wear, ball joint play, shock condition, tire wear pattern.
• Electrics: battery health, charging output, all lights and accessories, fault-code scan including manufacturer-specific modules.
• Body/chassis: rust (especially underbody), accident repair signs, panel alignment, flood damage indicators.

Use the inspection to negotiate: documented defects are leverage, and a PPI that finds nothing is worth the peace of mind. Skip it on high-value or high-mileage cars and you're gambling your budget.