Before You Buy: A Smart Shopper’s Guide to Inspecting a Used Car

Love at first sight…until the check engine light.
You’re scrolling through the internet when you come across a car you just have to have. You arrange to see it, and when you arrive, you overlook all the flaws because you’re convinced it’s the one. Then you get home and realize you’ve made a mistake.

We’ve all been there. The excitement of finding your dream car can cloud your judgment, leaving you with nothing but buyer’s remorse. Over the years, I’ve bought, sold, traded, and flipped countless vehicles, and I’ve learned a few things that have helped me avoid expensive mistakes. Here’s the process I use whenever I inspect a potential purchase.

Do your homework first.
The inspection starts long before you ever see the car in person. Gather as much information as possible beforehand, starting with the owner. Ask questions and pay attention to how they respond. Do they seem honest? Have they taken good care of the vehicle? If something feels off, trust your instincts. There are always more cars for sale.

Always ask for the VIN (Vehicle Identification Number) before meeting. With the VIN, you can purchase a vehicle history report from one of several online services for a relatively small fee. On most newer vehicles, these reports can reveal previous owners, accident history, title issues such as salvage or rebuilt titles, maintenance records, and other valuable information. If everything checks out, it’s time to inspect the vehicle in person.

Inspect the Car Cold
Whenever possible, inspect the car after it has been sitting for several hours. A cold engine can reveal problems that a warm engine may hide.

Start by checking all of the fluids:
– Engine oil should be clean and free of a milky appearance.
– Coolant should be clean and free of oil contamination.
– Transmission fluid (if accessible) should be bright in color and should not smell burnt.
– Brake and power steering fluids should be at the proper levels.

If the coolant looks oily, the engine oil smells strongly of gasoline or appears milky, or the transmission fluid is dark and burnt-smelling, those can be signs of serious mechanical problems. At that point, it may be best to walk away.

Once you’ve checked the fluids, start the engine.

The first 10 seconds can tell you a lot. Listen carefully for rattles, knocking, excessive ticking, or loud clunking noises that could indicate engine wear or timing chain issues. Also watch the exhaust. Excessive blue, white, or black smoke can point to underlying engine problems.

Walk Around the Vehicle
While the engine idles and begins warming up, perform a thorough visual inspection. Pay close attention to the body panel gaps. Run your fingers through the gaps between the fenders, doors, hood, and trunk. If you feel rough or gritty paint edges inside the seams, there’s a good chance that panel has been repainted.

This is especially important around the A-pillars, B-pillars, and roofline, where previous repairs could indicate the vehicle suffered significant collision damage.

Also compare the panel gaps from side to side. They should be consistent throughout the vehicle. Uneven or misaligned panels can suggest previous body work, panel replacement, or even structural damage.

An old trick that I was taught years ago was to walk around and tap your knuckle on areas that look like they may have been repaired. When tapping on metal body panels it should sound crisp and hollow not like a dense thud. This usually indicates lots of body filler or fiberglass.

Don’t Forget Underneath
Take a few minutes to look underneath the vehicle. Check for:
– Fluid leaks
– Excessive rust
– Worn suspension bushings
– Leaking shocks or struts
– Damaged steering components
– Uneven tire wear, as this can indicate alignment issues, worn suspension parts, or previous accident damage.

Take a Proper Test Drive
A short drive around the block isn’t enough. Drive the vehicle long enough for it to reach normal operating temperature. Watch the temperature gauge to ensure it stays where it should and doesn’t begin overheating, and keep an eye out for any of those pesky warning lights to come on.

For automatic transmissions, manually shift through each available gear (if equipped) and verify that each gear engages smoothly without harsh shifts, clunks, or slipping.

For manual transmissions, the clutch pedal should feel firm and engage around the middle to upper half of its travel. Shift through every gear and listen for grinding or unusual noises.

One simple clutch test is to drive around 30 mph, shift into the highest gear, and accelerate hard. If the engine RPM climbs quickly but the vehicle doesn’t accelerate accordingly, the clutch is likely slipping and may need replacement. While driving, listen for suspension noises over bumps and pay attention to steering feel. The vehicle should track straight without pulling to one side. At highway speeds, there should be no abnormal vibrations through the steering wheel or seat.

Give It One Final Inspection
After the test drive, perform one last walk-around. Look underneath for any fresh fluid leaks. Open the hood and check for smoke, burning smells, or anything that may have appeared once the engine reached operating temperature. Sometimes problems don’t reveal themselves until the vehicle has been driven. If everything still looks good, you can make your buying decision with much greater confidence.

When in Doubt, Get a Professional Inspection
If you’re not mechanically inclined, don’t be afraid to ask for help. Many independent repair shops offer pre-purchase inspections for a reasonable fee, and some dealerships may even perform one at little or no cost. Spending a little money before you buy can save you thousands of dollars in repairs later. A professional inspection won’t catch every possible issue, but it dramatically reduces the chances of buying someone else’s problem.