What is a pre-purchase inspection?

Pre-purchase inspections explained

A pre-purchase inspection involves hiring an independent, third-party mechanic to inspect a used vehicle’s condition, usually either before you buy it or during the return window after the purchase.

The purpose of a PPI is to get a detailed assessment of the vehicle’s current condition and any problems — minor or serious — it might be hiding. Your mechanic will check for things like dents and scratches, missing parts, mechanical issues, coolant levels, tire tread wear, electrical issues and much more. They’ll also perform a road test to assess the engine and transmission, listen for noises, check the suspension and ensure safe braking distances.

“A vehicle pre-purchase inspection holds immense value for consumers looking to buy a used car,” said Eric Hamilton, founder of Whyte Knyte Inspections. “By opting for a pre-purchase inspection, consumers can learn of any hidden issues or potential problems that will help them make an informed purchase decision and have peace of mind when all is good.”

In the end, your mechanic will produce a detailed report that should include their general notes plus a grade or check mark for each inspected component.

Many of the topics they’ll note aren’t apparent from an online listing, such as the stench of cigarettes or low fluid levels, which is why it’s especially smart to get a PPI if you’re buying a car in another state. Other issues might even slip past you during a test drive, like water under the oil filler cap or coolant leaks.

“Even though the pre-purchase inspection is not a diagnostic tool, it does reveal information not evident by a visual inspection alone,” explained Hamilton.

That’s why it’s wise to consider scheduling a PPI before committing to any used car purchase. It may cost you $200 or so, but it could save you from buying a car that needs thousands in urgent repairs or worse — a car that’s unsafe to drive off the lot. Even if the inspection report comes back clean, it can provide peace of mind that you’re getting a well-maintained car.

» MORE: 10 tips for first-time car buyers

How a pre-purchase inspection works

There is no universal standard for what to check during a pre-purchase inspection. Still, most ASE-certified mechanics will carefully inspect and document the condition of various elements of the car, such as its:

• Interior, including upholstery, switches, clocks, trip computers, heating, air conditioning, power locks, security system, front and rear defroster and radio/navigation system
• Exterior, including the paint, seals, glass, mirrors, alignment, moldings, wheels, tires, brakes and lights
• Mechanical components, including its battery, transmission, engine, coolant, filters, hoses, radiators, brakes and fluids
• Ride, including listening or feeling for issues with the engine, transmission, wheel bearings, suspension, brakes and safety systems.

As for the results, it’s typical for a mechanic to call you as soon as they’re done to give you their general thoughts over the phone. You’ll usually get the full written report later that day once your mechanic has a chance to write it up.

Keep in mind that a clean bill of health from a pre-purchase inspection doesn’t mean you’re immune to car problems down the road. If you want to protect the investment you’ve made in your car, you might want to look into extended warranty options.

» COMPARE: Top extended car warranties

Pre-purchase inspection cost

A typical pre-purchase inspection will cost you around $200, but expect prices to vary. Some mechanics may charge as little as $150 to inspect a simple, non-luxury vehicle like a Hyundai or Toyota. However, thorough PPI on a luxury/performance vehicle, like a Porsche, may cost $250 or more, especially if you hire a specialist mechanic.

The other factor that may affect what you pay is whether you can bring the car to the shop or need the mechanic to perform an on-site PPI. The latter service tends to cost more.