What is the construction and purpose of vacuum pumps?

Vacuum pumps are components responsible for generating vacuum in a car. A typical element consists of a housing, a mechanical or electric drive, vacuum connectors, and seals. They are mounted near the engine or within its accessories, depending on the vehicle design. Their primary task is to supply the brake booster and selected vacuum-controlled systems.

What are vacuum pumps used for?

Vacuum pumps are used to create a stable vacuum needed for the proper operation of the brake booster. In many cars, they also support control valves, actuators, and selected elements of the forced induction system. Without a functional vacuum, the brake pedal can become harder, and the response of pneumatically controlled parts can be delayed or unstable.

What is the construction and function of the vacuum system check valve?

The vacuum system check valve is an element that maintains the correct direction of vacuum flow between the pump and the consumers. It usually has a small housing with hose connections and an internal mechanism blocking air backflow. Its role is to stabilize the operation of the booster and protect the system against vacuum loss after a change in engine load. Damage to this element can cause symptoms similar to a faulty pump.

How to choose a vacuum pump for a specific car?

It is safest to compare the OEM number, interchangeable numbers, fuel type, and engine version. It is also worth checking the shape of the housing, the layout of the connectors, the drive method, and the mounting type. For some versions, the vehicle equipment and the type of accessories working with the vacuum also matter.

What symptoms indicate a problem with the vacuum pump?

Common symptoms include a hard brake pedal, weaker response of vacuum-controlled systems, and noise coming from the pump area. In some cases, oil leaks or unstable engine accessory operation also occur. However, similar symptoms can also be caused by leaking hoses or a damaged check valve.

What to pay attention to during installation and system tightness checks?

Before installation, it is worth comparing the mounting points, the condition of the seals, and the compatibility of the connections with the vacuum hoses. After installation, check the tightness of the connections and the operation of the brake booster in practice. A good procedure is also to check the associated elements so that the newly selected pump operates in stable conditions.

Vacuum pumps

At Global Parts, we offer a wide selection of original used car parts, including vacuum pumps for many popular car brands such as BMW, Mini, Mercedes, Audi, Volkswagen, and others. Our vacuum pumps undergo quality control to ensure you receive a top-quality product.

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Mercedes W222 Diesel OM656 Engine Breather Valve Oil Separator A6560101001

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Mercedes W177 W247 Vacuum Container Sensor Filter Solenoid Valve A0004703800

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Mercedes W222 Diesel OM656 Engine Breather Valve Oil Separator A6560101001

Mercedes W177 W247 Vacuum Container Sensor Filter Solenoid Valve A0004703800

Mercedes W639 OM651 Vacuum Socket Exhaust Gas Cooler A6511410069