What tests should be done when buying a used car?

The chassis of the car should be tested, and the tires of the car need to be checked, and it is also necessary to judge whether it is an accident car, and finally the configuration should also be tested to detect exhaust emissions.

First check the oil of the used car, then look at the use of the engine's belt and brake pads, and then carefully check the tires for obvious scratches and wear, in addition to check the chassis condition of the car, steering machine, steering rod, ball joint, shock absorber, etc.

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When buying a second-hand car, you must pay attention to the performance indicators of the car. It is necessary to check the previous driving history of the car and the current transaction procedures. Avoid buying water trucks and food carts.

Dear, the inspection of used cars needs to test the following items.

1.Number matching: The engine and body number must match the data in the driving book, otherwise it is not only illegal, but also cannot be compensated by the insurance company in the event of an accident.

2.Check the brakes: Try braking at different speeds to make sure there is no side skidding.

If it is equipped with an ABS system, you can try to brake suddenly at a speed of more than 30km h to test whether the ABS works properly. If the ABS is normal, you can feel the jumping sensation from the foot brake.

3.Look at the body: the connection between the doors, headlights, and taillights and the body is smooth and without interfaces. The color of the fenders in all parts of the body should be uniform, and there should be no protrusions and wavy lines when looking from the rear fenders to the front of the car.

4.Check the engine: first check whether the engine is damaged or leaking, whether the parts are damaged, whether the spark plugs are leaking, and then test whether the engine can start smoothly. It is best to test when the engine is cooling, and the results are more accurate.

5.Suspension test: press down the four corners of the body to observe whether the suspension reaction force is uniform, and pay attention to whether there is any abnormal sound when pressing the body.

6.Test the gearbox and clutch: Try changing different gears to make sure all gears work properly.

1. Pair number: The engine and body number must be consistent with the information on the driving book, otherwise it is not only illegal, but also cannot be compensated by the insurance company in case of an accident.

2. Check braking: Try to brake at different speeds to ensure that there is no side slip. If you are equipped with an ABS system, you can try to brake sharply at a speed of more than 30km h to test whether the ABS is working normally, and if the ABS is normal, you can feel the beating feeling from the foot brake.

3. Look at the body: the seam between the door, headlights, taillights and the body is smooth and there is no interface, the fenders of all parts of the body should be of uniform color, and there should be no bumps or wavy lines from the tail fender to the front of the car.

4. Check the engine: first look at whether the appearance of the engine is damaged or leaking, see whether the parts have been damaged, whether the spark plug is leaking, and then test whether the engine can start smoothly, it is best to test it when the car is cold, and the results are more accurate.

5. Test the suspension: press down the four corners of the body to observe whether its suspension response force is average, and pay attention to the no unusual sound when pressing the body.

6. Test the gearbox and clutch: try to change different gears to make sure all gears can work normally.

There are more than 500 test contents, in addition to checking accidents, fires, blisters, engines, gearboxes, exterior paint, interiors, skeletons, chassis, performance, computers, etc. In addition, for whether consumers are more concerned about whether to adjust the meter and the battery life of electric vehicles, the "inspection vehicle" also has scientific and effective testing methods.

After the inspection is completed, a visual inspection report will be issued for consumers to buy and sell vehicles for reference.

First of all, the appraisal of second-hand cars is mainly judged from two aspects, one is static observation. The other is dynamic testing, starting with static checks.

1. Static inspection.

1.Look at the paint: If there are any signs of respray after the paint has come off, check for excess paint around the exhaust pipes, trims and windows. If the vehicle is refurbished, it can be used as a reference for the old and new vehicle.

2.Degree of damage to the body: Observe the joints of the body, if the seams are not straight, the size of the gaps is not right.

1. The lines are bent and the decorative strips have fallen off, which proves that the car has had an accident and has been renovated or overhauled.

3.Look at the rust: check the protective plate, window, sink, bottom plate, and each joint for empty hall rust. If the rust is severe, it proves that the car is old.

4.Shock absorber and suspension system: press down the corner of the car, the vehicle should be able to bounce back after relaxation, and the normal will jump freely two or three times.

5.Tire situation: use a jack to jack up the front wheel, swing the front wheel left and right, up and down by hand, if there is a gap, it means that the bearing, ball head is worn. Observe whether the front wheel is worn unevenly and whether there are cracks on both sides, if the eccentric wear is serious, it proves that the front wheel alignment is not accurate.

2. Dynamic inspection.

1. Start the bucket eggplant and take a hidden step: check whether the clutch combination is stable, whether the separation is complete, and whether the clutch is shivering and ringing.

2. Transmission inspection: from starting to gradually increasing gears, and then downshifting from high speed to low speed, to see whether the transmission shifts flexibly, whether there are disorderly gears, jumps, clamps, etc., and whether there is abnormal sound.

3. Acceleration: The vehicle accelerates from the same place to about 60km h, feel if there is vibration, if there is, there may be a problem with the front suspension or wheels, or a problem with the propeller shaft.

Most of the people who ask this question don't know the car at all and don't know how to inspect the car.

The car inspection includes a lot of content, such as appearance, interior, power system, power system, chassis, etc., which must be carefully inspected.

If you don't understand the car at all, it is recommended to find Dr. Cha to do the test, and there is a 90-day repurchase guarantee after the test, and you are responsible for the condition of the car. You must not have the knowledge of testing from the Internet to think that you can inspect and change the test car, and the test car is a combination of technology and experience.

Because the car you buy, the age, mileage, and ** are not the same, so many people don't know how to choose when testing all the second-hand cars or testing the engine, chassis and other important components.

It is recommended to choose according to the situation of the car you have purchased, refer to Dr. Cha's testing, and his home testing can basically meet the needs of most people, accident investigation, important damage to only parts detection, whole car detection, luxury car detection, electric vehicle detection.

When buying a used car, make sure that the various accessories in the car are working properly, such as wipers, mirrors, hygrometers, heaters, defrosters, lights, turn signals, air conditioning equipment, etc. Then focus on the following items:

2. Degree of damage to the body: observe the joints of the body. If there are non-straight seams, gaps of varying sizes, curved lines, and peeling trim strips, it is a sign that the car has been in an accident and has been refurbished or overhauled.

3.Degree of corrosion on the body: The key is to check whether there is rust on the guards, windows, sinks, floors, and joints. If the corrosion is severe, it means that the car is relatively old.

4.Shock absorber and suspension system condition shed roll: Press down the corners hard. After lifting and selling width, the car should be able to bounce back and jump freely two or three times. Otherwise, it indicates that the shock absorber or suspension system spring is not working properly.

5. Front wheel alignment: jack the front wheel and swing the front wheel up and down with your hands. If there is a gap, the bearing and ball joint are worn. Observe whether the front wheels are worn unevenly and whether there are cracks on both sides. If the eccentricity is severe, it means that the front wheel chain is not properly positioned.

6. Steering condition: park the car on flat ground, turn the wheels back, run the steering wheel, detect whether the free travel of the steering is too large, and see whether the steering lever and ball head are lifted.

Millions of car purchase subsidies.

1. The fee for 122 items of accident investigation and testing is 299 yuan.

Only check whether the vehicle has the risk of accidents, fires, and blisters.

1. Major accident detection.

2. Fire detection.

3. Water soaking detection.

2. The fee for 193 items of important component testing is 499 yuan.

Check whether the vehicle has the risk of accidents, fires, blisters, and damage to important components.

1. Major accident detection.

2. Fire detection.

3. Water soaking detection.

4. Safety system detection.

5. Electrical system inspection.

6. Power system detection.

7. Body chassis testing.

3. There are 266 items of vehicle inspection, and the fee is 599 yuan.

Check whether the vehicle is at risk of accidents, fires, blisters, and damage to important components.

1. Major accident detection.

2. Fire detection.

3. Water soaking detection.

4. Safety system detection.

5. Electrical system testing.

6. Power system detection.

7. Detection of the body chassis.

8. Exterior and interior inspection.