Which component is NOT part of a vehicle’s air brake system?

The oil filter is not a component of a vehicle's air brake system. The air brake system primarily consists of the air compressor, air tanks, and brake chambers.

The air compressor is crucial because it builds the air pressure needed to operate the brakes. The air tanks store the compressed air, providing a reserve that ensures the brakes can function reliably. Brake chambers, which are located at each wheel, use the compressed air to apply the brakes by pushing the brake pads against the drums or rotors.

In contrast, the oil filter is part of the engine lubrication system and is not involved in any aspect of the air brake operation. Understanding the distinct roles of parts within the air brake system is essential for maintaining safe and effective braking performance in vehicles equipped with this system.