Diesel-run and turbocharging cars need a brake booster vacuum pump to create the vacuum required for the brake booster to function. If the brake pedal of your car is slipping, it might be time for brake vacuum pump replacement service. Book a mechanic on Swezo and have them inspect the brake booster vacuum pump and replace it if necessary. Let’s understand what it is why you need to replace it.

What does a Brake Vacuum Pump do?

Along with the primary brake system, vehicles also contain a brake booster. As evident from the name, its function is to supplement or boost the functions of the braking system. Whenever you press the brake pedal. The resulting force is transferred to a rod that passes through the brake booster to reach the brake master cylinder. This pressure activates the master cylinder piston.

The brake booster chamber has two sections that are separated by a rubber diaphragm. When the brake pedal is pressed, a vacuum is created on the brake pedal side of the brake booster chamber. This vacuum helps to increase the force of the brake. But in vehicles that run on diesel or require turbocharging, the engine doesn’t create this vacuum automatically. And that’s why these vehicles have a brake booster vacuum pump.

This pump draws out the air to create the necessary vacuum. This pump is also present in vehicles that are meant to run in high-altitude or difficult terrains. The main purpose of this pump is to create a vacuum without any help from the engine. It uses an electric control circuit that sends a signal from the brake booster vacuum sensor to monitor the level of vacuum.

Ideally, this pump should maintain up to the 18th of vacuum for effective functioning of the brake booster.

Why is Brake Vacuum Pump Replacement Needed?

If the brake vacuum pump malfunctions, it will not be able to create sufficient vacuum necessary for the brake boosters to work effectively. As a result, the overall effectiveness of your vehicle’s braking system reduces which can prove to be a safety hazard. So, if you notice issues with the brake booster vacuum pump, immediately contact an expert mechanic and get it fixed.

When do you need Brake Vacuum Pump Replacement?

Some of the common symptoms that indicate you may need to replace the Brake Vacuum Pump are:

  • Your brakes aren’t responding immediately
  • The brakes require more pressure to respond
  • You hear a hissing sound when you press the brake pedal
  • The brake pedal slips to the floor when the vehicle engine is running while the vehicle is stationary
  • You find it difficult to apply brakes, especially in high-traffic scenarios

Suggested for you: Brake Caliper Replacement Service

How is it Replaced?

If your vehicle is facing any of the above issues, you should contact an expert mechanic. They will inspect the brake booster system and verify if the brake vacuum pump requires replacement. It will be done in the following steps

  • Disconnect the battery and locate the faulty brake booster vacuum pump to identify the issue
  • Raise and support the vehicle on the jack stands and remove the engine under-shield to allow access
  • Disconnect the vacuum pump hoses and the electrical connector.
  • Remove the vacuum pump from its mounting bracket and replace it with a new one
  • Connect the hoses and the electrical connector to the new pump
  • Reconnect the battery
  • Test the brakes to check if the booster vacuum pump is working properly
  • Reinstall the engine shield and remove the vehicle from the jack stands
  • Road test the car for proper operations

Final Words

If the braking system of your car seems to be lagging, immediately book an expert mechanic on Swezo. They will inspect the brake booster system and let you know if the vacuum pump is damaged and needs replacement.

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