What component is essential for maintaining proper tire pressure?

The TPMS sensor, which stands for Tire Pressure Monitoring System sensor, is essential for maintaining proper tire pressure because it actively monitors the air pressure in the vehicle’s tires and alerts the driver when the pressure falls below a specified level. This system helps ensure that tires remain inflated to the manufacturer-recommended levels, which is critical for safe driving, optimal fuel efficiency, and extended tire life.

In contrast, tire rotation, wheel alignment, and brake pads, while important for overall vehicle maintenance and performance, do not directly monitor or maintain tire pressure. Tire rotation involves changing the position of tires to ensure even wear, wheel alignment affects the vehicle's handling and tire wear patterns, and brake pads are a safety component involved in stopping the vehicle. None of these components function in the same capacity as a TPMS sensor, which is specifically designed to measure and manage tire inflation.