Symptoms of a Bad or Failing Vacuum Booster

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Cost of Replacing a Bad or Failing Vacuum Booster

Common signs include a stiff brake pedal, intermittent power to the brakes, and a brake pedal that sinks all the way to the floor when applied. Our certified technicians can come to you and diagnose the problem. You will receive a $30 credit towards any follow-up repairs that result from the diagnostic. Following are example prices for Vacuum Booster Replacement. Click on the button below to get an upfront quote for your car.

Cars Estimate Parts Cost Labor Cost Savings Average Dealer Price
2007 Dodge Durango $303 $169.76 $133.00 19% $374.01
2005 Dodge Caravan $317 $183.76 $133.00 18% $388.01
2009 Ford Escape $243 $172.56 $70.00 13% $280.06
2008 Mercedes-Benz E350 $683 $508.39 $175.00 12% $777.14
2013 Mercedes-Benz CL600 $349 $173.96 $175.00 21% $442.71
2009 Dodge Viper $549 $381.16 $168.00 14% $639.16
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How to Diagnose a Bad or Failing Vacuum Booster?

vacuum booster

Diesel powered vehicles are typically equipped with a brake booster vacuum pump that applies additional power to the braking system, helping heavier vehicles come to a safe and complete stop. In general, diesel engines generate much less manifold vacuum pressure than a gasoline powered engine. Due to this fact, the secondary vacuum booster is installed by several diesel-powered manufacturers in order to support the brake booster which allows power assisted braking to occur.

The vacuum booster is a huge attribute to improve drivability and safe braking; especially for large diesel trucks. When this mechanical component fails, it typically produces several warning signs that will alert the driver to potential problems. Like many other safety devices, a problem with a failing or broken vacuum booster should not be ignored. If you recognize any of the below symptoms of a bad or failing vacuum booster, contact a ASE certified diesel mechanic, so they can test drive, diagnose and repair this problem as soon as possible.

Here are a few of the warning signs to look for that might indicate a problem with the vacuum booster.

1. Vehicle has a stiff brake pedal

The vacuum booster is designed to provide power to the brake system, allowing the brakes to apply more power through a progressive application. The result of a vacuum booster working correctly is that the brake pedal often feels smooth when applied. However, when the booster is malfunctioning or is broken, the brake pedal will be very stiff and requires the driver to safely apply pressure to the brakes in order to stop the vehicle without locking up the tires.

A damaged vacuum booster can lead to potentially unsafe driving conditions, especially in a heavy diesel powered truck. If you own or drive a diesel powered vehicle and notice that the brake pedal seems stiff, or takes additional time for the vehicle to slow or stop, contact a diesel mechanic as soon as possible as this might be a problem with the brake vacuum booster. If it is, the mechanic can complete the vacuum booster replacement much easier after a test drive and correct diagnosis.

2. Intermittent power to the brakes

The vacuum booster is designed to provide additional power to the brake system, however it does so gradually and produces consistent pressure to the brakes on each wheel. When the booster is not working correctly, the consistency of the brake pedal typically vanishes, producing intermittent power to the brakes. Most brake booster vacuum pumps are electrically powered. Due to this fact, problems with wiring or internal components can cause this intermittent condition to occur. If you notice that power to the brakes on your diesel is intermittent, please contact a diesel mechanic so they can test drive and correctly diagnose the problem. Most of the time this is a problem with a loose wire or electrical short that is causing this problem – but it's better to be safe than sorry.

3. Brakes pedal goes to the floor when applied

This situation can be extremely dangerous. One of the least common symptoms of a vacuum booster failure is if when applied, the brake pedal goes to the floor. This is typically a problem associated with a broken brake line or leaking brake fluid. However, sometimes it can be the result of a vacuum booster that has cracked and is leaking brake fluid from one of the connections. As with any of the above symptoms, a brake pedal that goes down to the floor without applying pressure should be inspected immediately by a certified diesel mechanic.

The brake booster vacuum pump is an important piece of the power brake system, as the power brakes cannot function without the vacuum it supplies. If you suspect that your brake booster vacuum pump may be failing, have the vehicle’s brake system diagnosed by a professional diesel technician. These experts understand diesel engines and the supporting components that help them operate. They will be able to determine if the car needs a brake booster vacuum pump replacement, or make any other repairs if needed.

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Recent Vacuum Booster Replacement reviews

Excellent Rating


YourMechanic Vacuum Booster Replacement Service

Average Rating

4.7/5

Number of Reviews

17

Rating Summary
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Angelo

29 years of experience
76 reviews
Angelo
29 years of experience
Great service, Angelo was able to fix my brakes fast and only fixed what was faulty. Work ended up being cheaper than originally quoted.
1999 CHEVROLET TAHOE - VACUUM BOOSTER - CORINTH, TEXAS

Peter

40 years of experience
1059 reviews
Peter
40 years of experience
This is the second time Peter worked on my truck that has 225,000 miles on it. Both experiences were great. First job was May of 2015...timing belt and water pump replacement. Today, 8/4/16, Peter replaced my brake booster, a leaky fuel fuel filter and fuel line. Fast, courteous and does what he says. I will continue to use Peter to service my truck.
2000 NISSAN FRONTIER - VACUUM BOOSTER - LITCHFIELD PARK, ARIZONA

Frank

12 years of experience
31 reviews
Frank
12 years of experience
he was on time ,polite ,professional.did the work quickly .work was done correctly..my car is difficult to work on.small car with no room to maneuver but he was able to get inside and get it done.
1977 MERCEDES-BENZ 450SL - VACUUM BOOSTER - DOWNERS GROVE, ILLINOIS

Duane

22 years of experience
324 reviews
Duane
22 years of experience
Very impressed.
2000 DODGE RAM 2500 - VACUUM BOOSTER - SAN DIEGO, CALIFORNIA

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