To maintain the safety and proper functioning of a vehicle, it is crucial that the tires are inflated to the **pressure recommended by the manufacturer**. This recommendation is based on the vehicle's specifications and ensures that the tires can adequately support the load and weight of the vehicle.

- **Correct pressure:** Inflating the tires to the pressure indicated by the manufacturer ensures that the vehicle has good road grip, stability, and even tire wear.

- **Pressure below recommended:** If the tires are inflated below the proper pressure, they heat up and deform more easily, which can lead to premature wear, increased fuel consumption, and an increased risk of skidding on wet surfaces. Additionally, there is a higher likelihood of the tire bursting.

- **Pressure above recommended:** Inflating the tires above the recommended pressure reduces contact with the ground, which decreases grip and causes uneven wear, especially in the center of the tire. It can also cause vibrations in the vehicle and damage the shock absorbers.

For these reasons, it is essential to check the tire pressure at least once a month and before making long trips or heavily loading the vehicle. Additionally, a spare tire with the correct pressure should always be carried.