How to Replace a Brake Booster Vacuum Sensor

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The brake booster vacuum pressure sensor is found in most vehicles equipped with an electric or engine-driven vacuum pump. This sensor monitors vacuum levels to the brake booster to ensure proper power brake operation. The sensor is typically located in the vacuum line from the vacuum pump to the brake booster.

If vacuum levels fall or if the vacuum pressure sensor fails, your car can have an illuminated Check Engine Light and/or a hard brake pedal. Since the brake system on your car is vital for your safety, ensure that you get this issue fixed as soon as possible.

Part 1 of 2: Locate the vacuum pressure sensor

Materials Needed

typical brake booster vacuum hose

Step 1: Determine the location of the vacuum brake pressure sensor. Usually, the vacuum pressure sensor is located in the vacuum line to the brake booster. However, the vacuum line may not be directly visible in front of the brake booster as it may run behind and/or under the windshield cowl.

Verify the sensor location for your specific vehicle before you begin or attempt the replacement.

typical vacuum sensor location

Step 2: Remove the pressure sensor. Once you locate the sensor, remove any trim pieces and brackets that may be present so that you can access the pressure sensor. After you gain access, use the appropriate pliers to remove the hose clamps and then pry the vacuum sensor from the vacuum hose.

Step 3: Install the new sensor. Once the old sensor is removed, you can install the new one.

Ensure that you replace and tighten the clamps that were removed earlier. Also, put back any other components and trim panels that may have been removed to access the vacuum sensor.

Part 2 of 2: Check the brakes

Step 1: Turn on your vehicle. Start the vehicle and allow the vacuum pressure to build back up in the brake booster.

Step 2: Check the vacuum. Depress the brake pedal a few times to verify whether you have vacuum assist.

Sometimes, simply replacing a faulty component may not automatically reset any warning lights that are present. If any warning lights remain illuminated, you may need to visit a local repair facility or auto part store to clear and reset the system.

If you are unsure about performing this process on your own, get one of the mobile technicians from YourMechanic to come to your home or office and replace your vehicle’s vacuum booster sensor.


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Pardeep

20 years of experience
652 reviews
Pardeep
20 years of experience
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Again 5 star service. And already scheduling him for my next appointment. Highly recommend Pardeep for your car needs.
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Great knowledgeable mechanic and fast great work. I will use Pardeep and your services again. Thank you

Theodore

15 years of experience
1137 reviews
Theodore
15 years of experience
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Theodore arrived on time, he did a great job replacing my brakes on my Camry, I will definitely work with him again.
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We have had previous work done by Theodore. Really appreciate his thoroughness and professionalism!

Matthew

32 years of experience
734 reviews
Matthew
32 years of experience
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We've been using Your Mechanic services for a few years, for a few reasons. The convenience of having an expert mechanic "on-call," the great pricing and transparency for services (saving 10% - 25% at times), most of all Matt is our go-to guy who is highly qualified, knowledgeable in the work and knows how to explain it to us in detail.
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Matt's technical knowledge of his profession is incredible! He is prompt, thorough, friendly, professional, engaging, and completes the job to 100% perfection! Thank you, Matt for the most outstanding auto repair service in all my many years!!!

Jason

31 years of experience
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Jason
31 years of experience
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Jason was very professional and friendly. He provided extremely honest and helpful advice on issues with my Altima that would require proactive future maintenance.

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