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Automotive vacuum hoses are a type of hose used to transfer vacuum. They play an important role in many systems in your car, including the fuel system, exhaust system, braking system, and air conditioning system.
The number of vacuum hoses in a car can be affected by the model. Small cars, SUVs, trucks, and luxury vehicles may all have different numbers and types of pipes in their vacuum systems. Some higher-end vehicles may be equipped with more vacuum tubes for more complex systems, while smaller vehicles may have a more simplified design. The number of vacuum hoses can also vary depending on the year and manufacturer of the car.

Primary Role of Vacuum Tubes

The main role of vacuum hoses in automobiles is to transfer vacuum force, which is created by the suction of the engine. This vacuum force is used to operate the brake booster, which helps the braking system work more easily. In addition, vacuum hoses are also used to control the emission system, air conditioning system, turbocharger, etc.

Automotive vacuum hose sizes and materials

Automotive vacuum hose sizes and materials vary by application. Generally, vacuum hoses in fuel and exhaust systems are smaller in size, while those in brake and air conditioning systems are larger.
Automotive vacuum hoses are usually made of rubber, plastic or silicone rubber. Rubber vacuum hoses are the most common type and offer good durability and cost-effectiveness. Plastic vacuum hoses have high heat resistance but are not as durable as rubber vacuum hoses. Silicone rubber vacuum hoses have very high heat and corrosion resistance, but are more costly.

Common automotive vacuum hose applications

Fuel system: Vacuum hoses are used to control fuel injection systems, exhaust gas recirculation (EGR) systems and intake manifold pressure (MAP) sensors.
Exhaust systems: Vacuum hoses are used to control exhaust gas recirculation (EGR) systems and vacuum brake boosters.
Brake System: The vacuum brake booster uses vacuum to help the driver depress the brake pedal.
Air Conditioning System: Vacuum hoses are used to control the air conditioning compressor and air conditioning blower.

How many vacuum hoses does a car have

Maintenance and care of automotive vacuum hoses

Automotive vacuum hoses should be inspected regularly for cracks, breaks or other damage. If damage is found, they should be replaced immediately.
Automotive vacuum hoses should also be cleaned regularly. Cleaning the vacuum hose can help prevent the buildup of dirt and debris, thus extending its life.

Symptoms of a malfunctioning automotive vacuum hose

The following symptoms may occur when an automotive vacuum hose malfunctions:

  1. Unstable engine idle
  2. Decreased braking assistance
  3. Air conditioning system does not work
  4. Black smoke from the exhaust pipe
    If you notice any of these symptoms, you should check the vacuum hose of your car.

Car vacuum hose replacement

Replacing your car’s vacuum hose is a relatively simple process. Generally, all that is required is to disconnect the connected vacuum hose and connect the new one to the appropriate location.
When replacing vacuum hoses, the following should be noted:
Select a vacuum hose of the appropriate size and material.
Ensure that the vacuum hose is firmly connected.
Clean the ports where the vacuum hose is connected.

Silicone Vacuum Hose


The layout and number of vacuum hoses can vary greatly between different vehicle models and manufacturers. To obtain an accurate count for a specific vehicle, it is recommended to consult the vehicle’s service manual or contact the manufacturer. Regular maintenance checks, including checking vacuum hoses for signs of wear or leaks, can help to ensure that the relevant systems in your vehicle are functioning properly.