Ram ProMaster 1500 Hissing noise when brake pedal is depressed Inspection at your home or office.

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Hissing noise when brake pedal is depressed Inspection Service

How much does a Hissing noise when brake pedal is depressed Inspection cost?

On average, the cost for a Ram ProMaster 1500 Hissing noise when brake pedal is depressed Inspection is $95 with $0 for parts and $95 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
2016 Ram ProMaster 1500V6-3.6LService typeHissing noise when brake pedal is depressed InspectionEstimate$114.99Shop/Dealer Price$124.99 - $132.49
2014 Ram ProMaster 1500V6-3.6LService typeHissing noise when brake pedal is depressed InspectionEstimate$94.99Shop/Dealer Price$105.01 - $112.52
2019 Ram ProMaster 1500V6-3.6LService typeHissing noise when brake pedal is depressed InspectionEstimate$94.99Shop/Dealer Price$105.01 - $112.52
2017 Ram ProMaster 1500V6-3.6LService typeHissing noise when brake pedal is depressed InspectionEstimate$94.99Shop/Dealer Price$104.99 - $112.48
2020 Ram ProMaster 1500V6-3.6LService typeHissing noise when brake pedal is depressed InspectionEstimate$94.99Shop/Dealer Price$105.02 - $112.55
2014 Ram ProMaster 1500L4-3.0L Turbo DieselService typeHissing noise when brake pedal is depressed InspectionEstimate$94.99Shop/Dealer Price$105.01 - $112.52
2017 Ram ProMaster 1500L4-3.0L Turbo DieselService typeHissing noise when brake pedal is depressed InspectionEstimate$99.99Shop/Dealer Price$109.87 - $117.28
2015 Ram ProMaster 1500V6-3.6LService typeHissing noise when brake pedal is depressed InspectionEstimate$99.99Shop/Dealer Price$110.24 - $117.94
Show example Ram ProMaster 1500 Hissing noise when brake pedal is depressed Inspection prices

Brakes are the most important safety components on your vehicle. Despite that importance, it’s easy to take them for granted, at least until your car begins to do strange things. Ordinarily, pressing your brake pedal should result in only the car slowing down or stopping. If you hear a hissing noise when the brake pedal is depressed, it may mean there’s something that needs to be repaired in the system.

How this system works:

On many cars, the master cylinder works in tandem with a brake booster. The brake booster is mounted to the firewall, generally in front of the steering wheel position, and the master cylinder attaches to it. The entire point of the brake booster is to make it easier to press the brake pedal and slow or stop the car.

Your brake booster works on vacuum pressure. There’s a diaphragm inside that is responsible for maintaining pressure when you’re not pressing the pedal. However, when you do press the pedal, a push rod moves forward within the booster and into the master cylinder. The side of the diaphragm facing the cabin vents to atmospheric pressure, while vacuum is maintained on the other side.

This then equalizes with pressure on the other side of the diaphragm, providing the boost needed to make pressing your brake pedal easier. The hissing noise you hear when the brake pedal is depressed could be nothing more than ordinary operation, or it could be a sign of a deeper problem. There are a couple of different potential issues here, some more severe than others.

Common reasons for this to happen:

  • Leaking Vacuum Line: Your brake booster is supplied with vacuum from the engine via a vacuum hose. It’s usually located near the firewall. If this hose has a leak, it can be heard within the cabin.

  • Leaking Brake Booster Diaphragm: The diaphragm that’s responsible for maintaining pressure within the brake booster can fail, particularly if the master cylinder is leaking fluid into the booster. When this happens, you’ll hear a hissing sound when depressing the brake pedal, but the pedal itself will be much, much harder.

  • Damaged or Missing Foam Silence: Most cars equipped with brake boosters also have a foam silencer that’s designed to help prevent you from hearing that hissing sound. If the silencer has degraded or been damaged, you’ll hear the hissing sound.

  • Failing Master Cylinder: If you hear a hissing sound and suspect that the problem is the diaphragm in the booster, the actual cause is likely the master cylinder beginning to fail. Signs that the master cylinder is leaking into the brake booster include low fluid in the reservoir with no visible leaks.

What to expect:

A top-rated mobile mechanic will come to your home or office to inspect your brake system, including the brake pedal operation, the brake booster and listen to the hissing sound. The mechanic will then provide a detailed inspection report that includes the scope and cost of the necessary repairs.

How it's done:

The mechanic will need to crank the car in order to verify the hissing sound, and a test drive may be necessary to duplicate the complaint. Additionally, the mechanic will inspect the brake pedal operation, the condition of the brake booster, the master cylinder, the level of fluid in your system and more.

How important is this service?

Power brakes are wonderful things, making it far easier to work a brake pedal that would otherwise require significant force to activate. While the hissing sound may be a sign of nothing more dangerous than a failed piece of foam, it could be a symptom of something much more worrisome – a damaged brake booster and a failing master cylinder. You cannot afford to take chances with your brake system. One of our professional mechanics can inspect the entire system and determine if there’s cause for concern, and what needs to be done if there is a problem.

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Robert

31 years of experience
641 reviews
Robert
31 years of experience
Ram ProMaster 1500 V6-3.6L - Oil Change - Los Gatos, California
Robert's the man. I trust him with my fleet of 5 vehicles. He gives you an honest job and walks you through your options. He's a skilled, honest professional who will look out for your best interests. So glad I found Robert at Yourmechanic.com

Robert

18 years of experience
18 reviews
Robert
18 years of experience
Ram ProMaster 1500 V6-3.6L - Brake Pads Replacement (Rear) - Atlanta, Georgia
Very friendly!

Wayne

10 years of experience
7 reviews
Wayne
10 years of experience
Ram ProMaster 1500 V6-3.6L - Pre-purchase Car Inspection - Morrow, Georgia
Wayne was helpful and I appreciate his honesty. Plus he was exactly on time! Very nice guy. Would book again.

Stephen

32 years of experience
179 reviews
Stephen
32 years of experience
Ram ProMaster 1500 V6-3.6L - Oil Change - Boulder, Colorado
Stephen is so friendly and helpful. Goes above and beyond. Thank you!

Excellent Rating

(26)

Rating Summary
24
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1
24
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Number of Ram ProMaster 1500 services completed
286+
services done by our mechanics
TOTAL NUMBER OF EXPERT Ram MECHANICS
300+
experts on our platform

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