The **tire inflation pressure** is crucial for the safety and performance of the vehicle. It is important to check it frequently and always before starting a long trip for several reasons:

- **Safety and stability**: Incorrect pressure can affect the stability of the vehicle. If the pressure is lower than recommended, the tire heats up, deforms, and wears out faster, increasing the risk of skidding on wet surfaces and the tire bursting. If the pressure is higher, the tire has less contact with the ground, which reduces grip and causes more vibrations in the vehicle.

- **Fuel efficiency**: Low pressure increases fuel consumption, as the engine needs more energy to move the vehicle.

- **Vehicle maintenance**: Checking the pressure at least once a month helps keep the tires in good condition and prevents uneven wear, which prolongs their lifespan and that of other components such as shock absorbers.

- **Preparation for long trips**: Before a long trip or when the vehicle is going to be heavily loaded, it is essential to check the pressure to ensure a safe and efficient journey.

For these reasons, it is essential to regularly check the tire pressure and especially before long trips, thus ensuring the safety and proper functioning of the vehicle.