Air compressors are critical components within a vehicle's air brake system, responsible for compressing air and delivering it to the air storage reservoirs. These reservoirs then supply pressurized air to operate the brakes, clutch, and other pneumatic systems in commercial vehicles and some passenger cars. Typically mounted on the engine or chassis, air compressors utilize a belt drive or electric motor to power a piston or rotary vane mechanism. Consistent and reliable air pressure is essential for safe and effective braking performance. Examples within this category include compressors from manufacturers like Wabco, and specific MAN units such as MPN 51158015173, 81.51201-0416, and 81.51201-0415. These compressors are designed to meet stringent OEM specifications for durability and performance.