Expert Tips on How to Inspect a Used Car - Consumer Reports

14 Jul.,2025

 

Expert Tips on How to Inspect a Used Car - Consumer Reports

Whether you are talking to a private seller or a used-car dealer, ask these questions over the or over . The answers can help you decide whether the vehicle is worth the trip to inspect.

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How many miles does it have? If the total mileage averages more than 20,000 per year or lower than 5,000, ask why. A high-mileage car used on a long highway commute may actually have less wear than a car that did a lot of short trips with stop-and-go driving. Still, be somewhat skeptical of any “these were all highway miles” claims. Also, while low mileage is nice, it’s no guarantee of gentle care.

How is it equipped? Whether they’re listed in the ad or not, ask about key features: transmission type, safety equipment, audio system, cruise control, power seats, Bluetooth, rear entertainment screens, backup camera, and navigation. Double-checking to confirm the listing can also tell you how honest the seller is being with the listing.

What’s the car’s condition? After you ask this intentionally broad question, don’t interrupt. The seller may bring up something you wouldn’t have thought to ask about.

How is the body and interior? If the seller didn’t address this already, ask specifically about both.

Has it been in a crash? If it has, ask about the extent of the damage, the cost of repairs, and who did the work. Don’t worry about minor scrapes, but think twice about a car that has been in a serious collision. Verify the seller’s answer with a vehicle history report, such as from Carfax.

Do you have service records? An organized pile of repair and maintenance documents usually indicates that a car has been cared for. Look up the maintenance schedule for the specific make and model of car you’re considering, and ask for copies of the car’s service records. Then, check to make sure the previous owners followed the manufacturer-specified service intervals. Also, ask for receipts for any parts that have been replaced. Receipts from repair shops normally note the odometer reading, helping you verify the history.

Are there open recalls? Ask whether any safety-recall work needs to be done. Dealerships can access the recall history, but with the VIN, you can check the manufacturer’s website or the National Highway Traffic Safety Administration website. Note the mileage when work was performed. To learn more, check CR’s Car Recall Tracker.

Body condition: Check each panel and the roof, looking for scratches, dents, and rust. Watch out for misaligned panels or large gaps, which can indicate either sloppy assembly at the factory or shoddy repair work. The paint color and finish should be the same on every body panel.

If you think the body or other parts of the car have been repainted, check for paint on the rubber seals around the hood and trunk lid. 

Rust is always a cause for concern, so check the body for blistered paint or visible rust. Check the wheel wells and panels, especially beneath the doors, and door bottoms. 

Open and close each door, the hood, and the trunk. Gently lift and let go of each door, particularly the driver’s door. If it seems loose on its hinges and won’t stay in place, the car likely hasn’t been used delicately. Inspect the rubber seals around each door for tearing or rot.

Glass: Look carefully at the glass to make sure there are no cracks or large, pocked areas. A small stone chip might not be cause for alarm, though you should bring it up in negotiations. But any crack in the windshield or other glass will worsen and lead to a costly repair.

Suspension: Walk around the car to see whether it’s sitting level. Then use your body weight to push down on each corner. If the shock absorbers are in good shape, the car should rebound just once before settling. If the car bounces up and down, it has suspension issues. Also, grab the top of each front tire and tug it back and forth. If you feel play in it or hear a clunking sound, the wheel bearings or suspension joints may be shot and require repair.

Lights and lenses: While in the driver’s seat, have a friend standing outside confirm that all lights are working—high beams, low beams, turn signals, and brake lights. Walk around the outside to make sure that all light lenses and reflectors are intact and not cracked, fogged with moisture, or missing. 

Tires: You can tell a lot about a car—and its owner—from the tires. A car with less than 20,000 miles, for example, should probably still have its original tires. Be wary of a low-mileage car with new tires. Also, check to make sure all four tires are the same. If there are different branded tires on the car, ask why they have been replaced.

Treadwear—how much the rubber has worn down—should be even across the width of the tread, and the same on the tires on the left and right sides of the car. Ask whether the tires have been regularly rotated. If not, in a front- or rear-wheel drive car, the wheels that get power will usually have more wear. 

If tires are more worn down on the outside edges, near the sidewall, that may indicate that the car has been driven aggressively. That can be okay, but consider it as a factor in the car’s overall history.

Tires that have been driven while overinflated tend to wear more in the middle than on the sides. Chronically underinflated tires will show more wear on the sides. "Cupped" tires—uneven wear marks across the tread—may be a sign of a larger problem with the steering, suspension, or brakes.

Tires must have at least 1/16 inch of tread to be legal on the road. Check the tread depth with a tread-depth tool—available at auto parts stores—or a quarter. Insert the quarter into the tread groove, with Washington’s head down. If you can see the top of his head, the tire should be replaced.

Examine the tire sidewalls for scuffing, cracks, or bulges. Also, look for dents or cracks on each wheel. Check to make sure the spare is in good shape, too, and that the proper jack and lug wrench are present.

Odor: When you first open the car door, sniff the interior. A musty, moldy, or mildewy smell could indicate water leaks. Remove the floor mats and check for wet spots on the carpet. An acrid smell may indicate that the car was used by a smoker. Check the lighter and ashtray (if so equipped) for evidence. Some odors, such as mold and smoke, can be very hard to get rid of.

Seats: Sit in every seat. Upholstery shouldn’t be ripped or badly worn, particularly in a car with low mileage. Try all the seat adjustments to make sure that they work properly, and that you can find a good driving position.

Don’t forget about the back seats and, if applicable, the third-row seat. Even if you won’t be sitting there regularly, try out each seating position to look for lumps in the padding or uneven support. If the seats can be folded down, make sure the lowering mechanism works. If it’s a three-row SUV or minivan, make sure the second-row seats can smoothly tilt or slide out of the way.

Pedals: The rubber on the brake pedal, clutch pedal, and gas pedal indicate how the car has been used. A car with low miles shouldn’t show much wear. Pedal rubber that’s worn through in spots—or brand-new—can indicate that the car has been driven a lot.

Instruments and controls: Turn on the ignition switch without starting the engine. Make sure all the warning lights—including the check-engine light—illuminate for a few seconds. When you start the engine, all of the lights should turn off. Note whether the engine is hard to start, and listen and feel whether it feels smooth at idle.

Then, try every switch, button, and lever. With the engine running, turn on the heater full blast to see how hot it gets, and how quickly. Then, switch on the air conditioning and make sure it quickly blows cold.

Sound system: Check reception on AM, FM, and, if the account is active, the satellite radio. If the car is old enough to have a CD player, try loading and ejecting a disc. Pair your smartphone via Bluetooth or plug it in. If the car has wired or wireless Android Auto or Apple CarPlay, pair your to make sure the system works.

Some older vehicles may have software compatibility issues connecting to newer phones. Check online for any potential issues, and ask the seller if there are software updates to address the problem.

Roof: Check the headliner and roof trim for stains or sags to see whether water is leaking through ill-fitting doors or windows. If the vehicle has a sunroof or moonroof, make sure it opens and closes properly and seals well when shut. Inspect a convertible top for tears by shining a smartphone or flashlight up into it.

Trunk: Use your nose as well as your eyes. Sniff and look for signs of water entry. See whether the carpeting feels wet or smells musty, and check the spare tire well for water or rust.

Wait until the engine is cool. Ideally, the car hasn’t been driven for at least an hour. First, inspect the general condition of the engine bay. Dirt and dust are normal, but be wary if you see oil splattered about or on the pavement below. Also, be on the lookout for a battery covered with corrosion, or wires and hoses hanging loose.

Hoses and belts: Squeeze the various rubber hoses running to the radiator, AC, and other parts. The rubber should be firm and supple—not rock-hard, cracked, or mushy. Feel the drive belts to determine whether they are frayed. 

Fluids: Check the owner’s manual for the section on fluids, which will point out where each reservoir should be filled to. Find and remove the oil dipstick first. Engine oil could be dark or light colored, but it should not be gritty. If the dipstick has water droplets on it or shows gray or foamy oil, it could indicate a cracked engine block or blown head gasket, two serious problems. 

When you finish checking the oil, turn the car on and let it warm up. Then, check the automatic transmission fluid with the engine warmed up and running. With some vehicles, the dipstick has two sets of marks for checking when the engine is cold or warm. 

Transmission fluid should be pinkish, not brown, and smell like oil, with no burnt odor. The dipstick shouldn’t leave visible metal particles on a rag, another sign of a more serious problem. 

Power steering and brake fluids should be within the safe zone—between the notches indicated on the reservoir. 

Radiator: Look into the plastic reservoir connected by a rubber hose to the radiator. The coolant should be greenish or orange, not milky or rusty. Greenish stains on the outside of the radiator are a sure sign of leaks.

Battery: Some “maintenance-free” batteries have a built-in charge indicator: Green usually means the battery is in good shape, and yellow or black usually means it’s dying. However, these indicate the condition of just one cell and might not accurately reflect the health of the whole battery. 

For more Used Special Vehicle Dealerinformation, please contact us. We will provide professional answers.

It’s unlikely that you’ll encounter a battery that requires maintenance such as filling it with distilled water. But if the battery has filler caps, wipe off the top with a rag, then carefully pry off or unscrew the caps to look at the liquid level. A low level may mean that the battery has been working too hard.

If you end up purchasing the car, you should have a mechanic or someone at an auto parts store check out the charging system and perform a “load test” on the battery. This is particularly important if its been two years since the battery has been checked. If the battery is approaching four or five years old you’re going to need to replace it

Electric vehicles and hybrids: Before any test drive, make sure that the battery has been fully charged so you can observe its projected range. For hybrids, check the in-car display to ensure that the battery is charging and discharging while you drive.

If the car passes your own inspection, before you close the deal, plan to have the car scrutinized by a repair shop. A dealer should have no problem lending you the car to have it inspected as long as you leave identification. If a salesperson tells you that an independent inspection is not necessary because the dealership has already done it, insist on having your mechanic look at it. If a private seller is reluctant to let you drive the car to a shop, offer to follow the seller to the inspection shop. 

A thorough diagnosis should cost around $100 to $150, but check the price in advance. Ask the mechanic for a written report detailing the car’s condition, noting any problems found and the cost to repair them. You can then use the report when you begin to negotiate with the seller.

If you don’t know of any repair shops, you can ask a local auto parts store for the name of a good shop. If you can’t get referrals, look for a nationwide used car inspection service, such as SGS or Carchex, or at the Car Care Council, an organization supported by the auto aftermarket industry. Note that there are no performance criteria for shops listed on the site.

Research the companies on the Better Business Bureau’s website to check for complaints about any shops you are considering using. Members of the American Automobile Association (AAA) can use one of its recommended facilities.

If you’re going to a shop for the first time, look for certificates or window decals from AAA or the National Institute for Automotive Service Excellence (ASE). AAA-certified garages must meet certain quality standards. The ASE grants certificates to mechanics who pass exams in any of eight areas of expertise. The ASE does not certify shops as a whole, but if 75 percent of the employees are ASE-certified, the shop can carry the seal.

Buying a Used Car - Kentucky Attorney General

​​Many consumers dread buying a car, especially a used car. Here are some typical questions your might have.

Is the car in good mechanical condition?

  • Have the automobile inspected by a mechanic of your choice before buying it or signing any documents.
  • You can request information about the previous consumer owner of a used car if the information is reasonably available. If the dealer tells you the information is not available, you might consider looking at another car. Under Kentucky law, it is unlawful for any motor vehicle dealer or motor vehicle salesperson to refuse to furnish, upon request of a prospective purchaser, the name, address, and number, if known or available, of the previous consumer-owner of any used car offered for sale. Call the previous owner and ask about maintenance and any previous problems.

What rights do I have if there is a problem after I buy the car?

  • Check the FTC Buyer's Guide which is required to be conspicuously posted. It will tell you whether the automobile is being sold “As Is”. If there is a warranty, it will spell out specific details of the warranty. See below for more information.
  • In some cases, there may be a manufacturers warranty still on the automobile (or a portion of it). Manufacturers will not honor the warranty, however, if they have reason to believe the odometer has been rolled back or the problem is due to a previous accident.
  • If you can prove very specific misrepresentations, you may have a claim for fraud or a private claim under KRS 367.220 for violation of the Consumer Protection Act. You might be able to revoke acceptance under the Uniform Commercial Code (KRS Chapter 355). You will need to consult a private attorney on these matters, however, as the Attorney General cannot represent individuals.
  • There is NO statutory right to cancel the sale, even if done immediately. Likewise, there is NO used car lemon law.
  • You can file a complaint with this office and with the Kentucky Motor Vehicle Commission in Frankfort. Neither agency, however, can represent you individually nor give you rights that you do not already have (e.g., buying a car “As Is” really means no warranties of any kind).

What is a “program car?”

  • By regulation of the Motor Vehicle Commission, a “program car” can be any one of a number of types of cars including a demonstrator, a previously leased vehicle, or even an automobile repurchased from someone else as a new car “lemon”.

What rules govern used car sales?

If you are buying a used car, the Federal Trade Commission's used car rule may help you. The rule requires all used car dealers to place a large sticker - “Buyers Guide,” in a conspicuous place in each used vehicle they offer for sale. The Buyers Guide will state:

  • whether the vehicle comes with a warranty and, if so, what specific warranty protection the dealer will provide;
  • whether the vehicle comes with no warranty (“as is”);
  • that you should ask to have the car inspected by your own mechanic before you buy;
  • that you should get all promises in writing; and
  • what some of the major problems are that may occur in any car.

Whenever you purchase a used car from a dealer, you should receive the original or an identical copy of the Buyers Guide that appeared in the vehicle you bought. The Guide must reflect any changes in warranty coverage that you may have negotiated with the dealer. It also becomes a part of your sales contract and overrides any contrary provisions that my be in that contract.

Dealers are required to post the Buyers Guide on all used vehicles, including used automobiles, light-duty vans, and light-duty trucks. A “used vehicle” is one that has been driven more than the distance necessary to deliver a new car to the dealership or to test drive it. Therefore, “demonstrator” cars are covered by the rule. Motorcycles are excluded.

Is a used car covered by warranty?

A major portion of the Buyers Guide gives you new and important information you can use when you select a used car. In the past, lack of information and misunderstanding about warranties frequently were a source of consumer problems. The following sections explain the warranty portion of the Buyers Guide:

“As is”
If a car is sold “as is,” this means that if you have problems with the car after you buy it, you must pay for any needed repairs yourself. The dealer has no further responsibility for the car once the sale is complete and you drive off the lot.

If the dealer offers a vehicle for sale “as is,” without any warranties, the box provided next to the “As Is” disclosure will be checked.

Warranties
If a dealer offers a warranty on a used vehicle, he or she must fill in the warranty portion of the Buyers Guide. Examine the warranty carefully before you buy to see what is covered and what is not. The warranty that the dealer offers may give you some idea of what the dealer thinks about the condition of the vehicle.

If the dealer makes any promises to repair the vehicle that are not listed on the Buyers Guide, ask that those promises be added to the contract. The sales contract also must include other specific information about your warranty.

Look for the following information on the Buyers Guide:

  1. See if the warranty offered is “full” or “limited.” A “full” warranty provides the following terms and conditions:

    1. Warranty service will be provided to anyone who owns the vehicle during the warranty period when a problem is reported.
    2. Warranty service will be provided free of charge, including such costs as returning the vehicle or removing and reinstalling a system covered by the warranty, when necessary.
    3. At your choice, the dealer will provide either a replacement or a full refund if the dealer is unable, after a reasonable number of tries, to repair the vehicle or a system covered by the warranty.
    4. Warranty service is provided without requiring that you return a warranty registration card.

    If any one of the above statements is not true, then the warranty is “limited.” A “full” or “limited” warranty need not cover the entire vehicle. The dealer may specify only certain systems for coverage under a warranty. By giving a “limited” warranty, the dealer is telling you that there are some costs or responsibilities that the dealer will not assume for systems covered by the warranty.

  2. Check the percentage of the repair cost that the dealer will pay. For example, “the dealer will pay 100% of the labor and 100% of the parts...”
  3. Check which specific systems are covered. The exact systems covered (such as frame and body, brake system, etc.) must be listed. A list of descriptive names of the major systems of an automobile is printed on the back of the Buyers Guide.
  4. Check the duration of the warranty for each covered system. For example, “30 days or miles, whichever occurs first.”

Unexpired Manufacturers' Warranties
If the used vehicle is still covered under the terms of the manufacturer's original warranty, the dealer may add the following paragraph in the space below the warranty disclosure.

MANUFACTURER'S WARRANTY STILL APPLIES. The manufacturer's original warranty has not expired on the vehicle. Consult the manufacturer's warranty booklet for details as to warranty coverage, service location, etc.

This does not necessarily mean that dealers also offer their own warranty in addition to the manufacturer's. If you have any questions about warranty coverage, ask the dealer to let you examine any unexpired warranty on the vehicle.

Other Parts of the Buyers Guide
There are other important sections of the Buyers Guide. These sections are explained below.

Spoken Promises
A statement appears on the Buyers Guide that warns consumers not to rely on spoken promises. Oral promises are difficult, if not impossible, to enforce. Have the dealership put any promises in writing, or do not count on the promise.

This statement also reminds you to keep the Buyers Guide after purchasing the vehicle. The Buyers Guide will serve as proof of written promises.

Service Contracts
When you buy a car, you may be offered a service contract. Although often called “extended warranties,” service contracts are not warranties. Warranties are included in the price of the product. Service contracts come separately from the vehicle, at an extra cost. To decide whether you need a service contract, you should consider several factors: whether the warranty already covers the repairs that you would get under the service contract; whether the vehicle is likely to need repairs and their potential costs; how long the service contract is in effect; and the reputation of the dealer offering the service contract.

Pre-Purchase Independent Inspection
The Buyers Guide also includes a suggestion that you ask the dealer whether you may have the vehicle inspected by your own mechanic either on or off the premises. An independent inspection lets you find out about the mechanical condition of the vehicle before you buy it.

Some dealers will permit you to take the car to an independent mechanic. Others may have good reasons for denying this request.

With the dealer's permission, you can bring an independent mechanic to the used car lot. If you do not already have a mechanic you rely on, ask someone who knows about cars for the names of competent, reputable mechanics. You also can find mechanics through advertisements, car repair establishments, automobile associations, and auto diagnostic centers in your community.

Vehicle Systems
The Buyers Guide includes a list of the 14 major systems of an automobile and some of the major problems that may occur in these systems. You may find this list helpful to evaluate the mechanical condition of the vehicle. The list also may be useful when comparing warranties offered on different cars or by different dealers.

Dealer Identification and Consumer Complaint Information
On the back of the Buyers Guide, you will find the name and address of the dealership. In the space below that, you will find the name and number of the person at the dealership who should be contacted if any complaints arise after the sale.

What about buying from a private seller?

If you buy a used car from a private individual, the sale is not covered by the rule. Private sellers do not have to use the Buyers Guide. In most private sales, the car is sold “as is.” Without a written contract with specific repair provisions, a private seller has no further responsibility for the car. Of course, if you have a written contract, the seller must live up to the promises stated in the contract. Depending on its age, the car may be covered by a manufacturer's warranty or service contract. Ask the seller to let you examine any unexpired warranty or service contract on the vehicle.

Even without the Buyers Guide, when you buy a used vehicle from a private party, you can follow the suggestion outlined above. For example, refer to the list of potential problems displayed on the Buyers Guide. In addition, ask the seller whether you may have the vehicle inspected by your own mechanic.

What more should I know?

Look at our online guide to odometer rollbacks and previous consumer owner information. We also suggest you check out our Consumer Resource page for more information including statutes and links to other sites.

See also KRS 186A.530 regarding rebuilt, water-damaged, and junk vehicles.  And, KRS 190.080 regarding a dealer's obligation to furnish the name of the previous owner of a used car.

For more information, please visit Battery Electric Vehicle For Sale.