Driving for a long time will naturally encounter some minor car problems, so to speak "long-term illness leads to being a doctor". The following are a few tricks for self-repair of minor faults.
Minor problem 1: Shaking when starting the car in the morning.
Trick: Due to individual cylinders not working well and valves not closing tightly, running on highways is a way but it costs money. You can run at high speed for a while in 3rd or 4th gear, with the same effect. If the car doesn't shake when warm but shifting gears is not smooth, it may be due to uneven fuel injection from the injectors, which requires testing and cleaning.
Minor problem 2: Feeling that the brakes aren't as effective as before.
Trick: Step hard on the brakes a few times when waiting for a red light, and it will work.
Minor problem 3: Vehicle drifts.
Trick: Increase the air pressure in the front wheel on the drifting side or decrease the air pressure in the tire on the other side.
Minor problem 4: In the morning, when starting the engine, you find insufficient battery power and the starter is struggling.
Trick: Pour a bottle of hot water over the battery, turn off all electrical equipment, including closing the car door. After 5 to 10 minutes, you can start the car, then drive to replace the battery.
Minor problem 5: Loose car door handle or tight, stiff key turning.
Trick: Open the front door, and on the side, you will see a plastic cover. Remove it, and you will see a screw inside. Loosen a few turns, and you can pull out the lock core from the outside. There is a wire clip on the handle, adjusting the tightness of the wire will do. The screws for the rear door are hidden by the seal strip; you can move them aside by hand. Before installation, apply grease inside the lock core, and the handles and locks on the car door will be easy and restored like new.