1.Check the condition of the tires before getting in the car，If the tire pressure is particularly low, it will be inconsistent with the other three wheels，In addition, according to visual inspection, one side of the vehicle will be higher and the other side will be lower；

2.Most cars are now equipped with tire pressure monitoring，Tire pressure monitoring is divided into direct monitoring and indirect monitoring。Direct monitoring can display the vehicle’s tire pressure through the instrument and central control screen。Indirect monitoring is to detect the length of one tire rotation through the wheel speed sensor，Inconsistent wheel speed，The corresponding tire pressure fault will be displayed；

3.Check with a simple tire pressure gauge，Remove the valve cover，Use the tire pressure gauge to press firmly on the valve，The tire pressure value will be displayed in the table。

1.Preparation stage

①Reflective triangle warning sign:Usually the model is on the rear trunk lid of the vehicle and in the trim panels on the left and right sides；

② Spare tire:In the spare tire slot in the rear trunk of the vehicle，Make sure the spare tire pressure is normal。

③Jack:The vehicle will basically be equipped with tools.

④Tire bolt wrench:The vehicle tools will be equipped，Usually in models near the spare tire in the trunk and in the trim panels on the left and right sides。

⑤Anti-theft bolt(Equipped on some models)

2. Replacement stage

①Vehicle pull over，The gear is in (automatic) P position (manual) N position，Pull the handbrake，Turn off，Turn on hazard warning lights (double trip lights)；

②Place the reflective triangle warning sign 150 meters away from the rear of the vehicle；

③Loosen the flat tire bolts diagonally，Cannot unscrew the bolts (note: the vehicle has not been lifted yet，There will be safety hazards if all are screwed out)

④Use a vehicle jack to place a reinforcing rib on the lower part of the car body near the tire (the vehicle owner's manual has instructions). Operate the jack to lift the tire off the ground, and then use a tire wrench to remove all the tire bolts from the wheel。

⑤Carefully remove the tire that needs to be replaced，Install the spare tire flat according to its original position and tighten all the tire bolts in sequence，Use the tire wrench to tighten the bolt all the way。(Note: Check whether the tire bolts are installed in place，The vehicle must not be lowered in a loose state，Otherwise, the tire bolts may not be installed in place, causing danger)。

⑥After rotating the vehicle jack in the opposite direction so that the tires are in contact with the ground，Use a tire wrench to tighten the tire bolts diagonally (note: the bolt tightening sequence must be tightened diagonally，Those who are generally strong can operate it directly with their hands。）

⑦Replace the vehicle tools and reflective triangle warning sign in their original positions in the vehicle。

3. Correct use of spare tires

Vehicle spare tires are divided into full size and non-full size: full size is the same size and model as the tire in use，Can be used as the main tire。Not full size means the tire size is inconsistent with the original car，Can be used but there is a speed limit。(Note: Be sure to pay attention to vehicle speed for non-full-size tires，Excessive speed can cause safety hazards。）

4. Tire repair

After replacing the tire, find a tire repair spot nearby，Ask the tire shop technician to help check the tire pressure of the remaining tires and replace the spare tire。